Last name didn't change after getting married.
I moved two sims in together and when they got married, the female still has the same last name she did before they got married, and their child has her last name.
Forum Discussion
One of my sims BF died and she wasn't notified. :( so different than TS3. I have a feeling if we want those type of relationships (mourning, etc) then we're going to have to stick with TS3. I really hope that's not the case, though.
