[NEEDS SAVES] Partnered Sims turn into siblings

by Koramie

Original Post

Re: married sims cannot do anything romantic

★★★★ Expert



It does involve cheating.


On PC, you can open the cheats console with control-shift-c and type testingcheats on and enter. You should get an acknowledgement.


If you have four free household slots you can continue. If not, move one of the partners out.


In the cheats console, type cas.fulleditmode and enter. You should get an acknowledgment. 

Edit the household in create-a-sim (plan outfits). If you have Growing Together, do not edit traits! Probably the easiest thing would be to use the play with genetics option to create parents. You can move them out after you create them; they just need to exist.


If you’re able and willing to use mods, people are using MC Command Center and UI Cheats to help fix this. Sacrificial has a mod called Life Manager that might help, as it creates a full family tree for your Sim. Or you can just create parents in CAS.


This video, while not exactly solving your problem, might help.  https://youtu.be/mycAKRFS4nQ?si=V0fUcim9lOIqy7gq

Message 161 of 168 (484 Views)

partnered sims turn into siblings

★★★ Newbie

Product: The Sims 4
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number?
What expansions, game packs, and stuff packs do you have installed? snowy escape, eco lifestyle, discover university, island living, get famous, seasons, cats and dogs, city living, get together, get to work, werewolves, realm of magic, vampires, strangerville, parenthood, spa day, outdoor retreat, paranormal. tiny living
Steps: How can we find the bug ourselves? have two spellcasters of the same sex romantically involved and open up cas while cheat code cas.fulleditmode is activated
What happens when the bug occurs? the game sets the two lover sims as siblings
What do you expect to see? no forced familial relations
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

(the screenshots are taken after turning cas.fulleditmode on, before and after opening up cas

Message 162 of 168 (390 Views)

Re: partnered sims turn into siblings

EA Sims Team


If you are still encountering this on the latest game version (without mods), would you be willing to share your save file(s)?

If so, please send me a private message with a link to the file.

Instructions here: http://x.ea.com/74420

Message 163 of 168 (355 Views)

Re: [NEEDS SAVES] Partnered Sims turn into siblings

★★★★★ Novice

My game is plagued with this. I've tried doing it Vanilla and fixing with just cheats, and nothing works. Partners become siblings, parents are no longer set as parents so they're free to just romance them with this too. 

Message 164 of 168 (290 Views)

Partners become Siblings after leaving CAS

★★★★★ Newbie

No matter what I do, whenever I enter and leave CAS it turns my sims from married into married siblings. Obviously this is not ideal, I would like them to just be married. I tried turning off cas.fulledit but it still happens. Is there any way to fix this issue without going through MCCC and deleting one partner's relationships and manually adding them back in?

Message 165 of 168 (270 Views)

Sims 4 save file

★★★ Newbie

At some point, the siblings relationship was added to the couple sims .( I will call the man of this couple ‘D’ and call the woman of this couple ‘L’) I guess this error occurred cus I added L to D’s family and delete L’s family relationship with D’s other family a few times.Even if I deleted the sibling relationship using mccc, the sibling relationship is added again after editing sim or managing the village.(I was really noob so I didnt know how to solve error.)So I clicked the new game button after saving the couple in the library. And Its been 2month that I started new game. But I miss the other family(D’s parents and siblings.).but I deleted D’s parents and sinlings in library since If i add D’s parents and siblings to the game and make them to be a family with D , the sibling error occurs again.Im thinking of recovering D’s parents and siblings . So I’m going to copy old save files and put them in the save folder after deleting my current existing save files, then save only that family in the library and delete the old save file again and fill save folder with my current save file. Is this a safe way ? If I do that , Can the sibling error occur again?


Message 166 of 168 (120 Views)

Re: Sims 4 save file

@laheehamzi1221 I merged your post with the bug report of partnered sims turning into siblings. It's a bit unclear what causes the issue but EA is looking for saves so if you can send yours, that'd be great: https://answers.ea.com/t5/Bug-Reports/NEEDS-SAVES-Partnered-Sims-turn-into-siblings/m-p/13247421#M26...

Good Luck


I don't work or have any association with EA. I give advice to the best of my knowledge and cannot be held responsible for any damage done to your computer/game.
Please only contact me via PM when asked to do so.

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Message 167 of 168 (79 Views)

Re: partnered sims turn into siblings

[ Edited ]
★★★ Newbie

Hi, I recently started having this issue.


Product: The Sims 4 (Digital Deluxe)
Platform: Mac
Which language are you playing the game in? English
How often does the bug occur? Every time
What is your current game version number? 1.105.332.1220

What expansions, game packs, and stuff packs do you have installed?

Expansion Packs: City Living, Get to Work, Get Together, Cottage Living, Seasons, Cats and Dogs, Discover University, Eco Lifestyle, For Rent, Get Famous, Growing Together, High School Years, Island Living, Snowy Escape

Game Packs: Dine Out, Outdoor Retreat, Spa Day, Dream Home Decorator, Parenthood (Every Day Sims Bundle), Parenthood (Pet Lovers Bundle), Jungle Adventure, My Wedding Stories, Realm of Magic, Star Wars Journey to Batuu, Strangerville, Vampires

Stuff Packs: Bowling Night, Luxury Party, Movie Hangout, Tiny Living, Laundry Day, My First Pet, Backyard, Cool Kitchen, Fitness, Kids Room, Laundry Day, Movie Hangout, Perfect Patio, Romantic Garden, Toddler

Add-Ons: Street Eats Digital Content, Awesome Animal Hats Digital Content, Life of the Party Digital Content, Holiday Celebration Pack, Up All Night Digital Content, Bust the Dust Kit, Country Kitchen Kit, Courtyard Oasis Kit, Desert Luxe Kit, Industrial Loft Kit

Steps: How can we find the bug ourselves? 

1. Create two same-sex sims in two separate households - sim A to have one parent and one twin with ability to get sims pregnant, and sim B to have two parents. Play game and gain high friendship and high romantic relationship - become girlfriends, become fiancees, move sim B into sim A household, move sims A and B out together, become wives.

2. Sim B to have science baby with sim A using sim A's twin sister as donor.

3. Sim A to adopt child as care dependent, then clear relationship between child and sim A's twin sister (as twin sister is mother of child - is this a bug???).

4.. Play game, save game, close game, re-open game and resume in sim A's parent household (game closed in sim A and B household - is this also a bug?). Sim A to arrive shortly without being invited.

5. Sim A's mum to give sim A's twin sister a makeover opening CAS (cas.fulleditmode not on) as work from home task while in Stylist career and while sim A is still present on lot.

6. After makeover complete, play as sim A and return to sim A's lot. Bug to occur from this point, when CAS entered with or without cas.fulleditmode on, and when relationships fixed, game saved, then reopened

What happens when the bug occurs? Sim A and B become sisters, grandparent/granddaughters, or aunt/niece
What do you expect to see? Sim A and B related through marriage only with child as daughter of both 
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes, all mods always updated to most recent version after patch updates and before starting game, problematic custom content always removed before reloading game and without saving game
Did this issue appear after a specific patch or change you made to your system? After most recent patch and once makeover completed


Most recent save: Slot_00000008.save.txt


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