Marriage

Not sure

Yes

How do u promote a sim?

I don’t know I am hoping that we could control them.

Yes

Yes they move in and u have to promote them

Yes they will move in but you can't control them like a playable SIM. You can only dress them and attach them to outtings under their SIM. But they can't go to work or do events on their own.

Ya. They move in and if you retired a Sim, you can "promote" him/her and can become playable

I just got married to a random sim I want to promote him but he after they married he wasn't in the family portrait

Hey there! So I just made a sim named Alexander so I want to find him his soulmate.. So he married a random sim.. Well unexpectedly, one of my sim is ready to retire.. When I retired her, I realise that my household is free and I can promote the random sim Alexander married!So I already did this like twice already!my discovery,u can control those random sims when you promote them..