I remember a post that was about romances and partners being world-specific. I’m wondering if that causes any issue... like broken family-tree issues. if a sims makes another relationship in another world without breaking the current one before they move, wouldn’t it cause any problem in the family trees in both worlds... cause I’m trying to send some sims to a different world. I’m ok with them cheating on their partners and making another relationship but I don’t wanna mess up their family trees...

Maybe others have had different experiences, but I don't see why multiple romantic partners/spouses would break family trees as long as the different partners are never in the same world at the same time. It shouldn't be any different than sims having children with different other sims even in the same world.

Oh so then what happens with that pink line for relationships in the family tree if a sims has two different significant others in two dffernent worlds? Isn’t pink line supposed to connect only one sim?

I haven't done this for years, but I remember one of my sims married bigamously while on vacation in another world, and when he returned, he was no longer married to his original wife.