I was playing the Legacy Challenge in Sunset Valley and am about to go into gen 2 when I noticed that all my friends were white-haired and still hadn't produced any babies. My Sim daughter Alicia got married to Mortimer Goth, but otherwise everyone else who DIDN'T have white hair was married, but NO KIDS! My kids go to school and befriend oldies -_-. So I searched this thread, and think I will populate my hood a little to introduce some new blood, and INSTALL A LOT OF CRIBS. I seriously hope that works!

My main question is: when Alicia was in a relationship with Mortimer and she invited him over to the house, they were hanging out doing romance interactions and stuff, and then suddenly I got a pop up saying: Alicia and Mortimer get along so well... yada yada.. would you like to move Alicia in with Mortimer? It was awesome, just what I wanted, since Alicia's sister-in-law was pregnant using fertility treatment and I was worried triplets or twins might come along; but I didn't want to exactly kick her out. Is this random or is there something I can do to trigger this event in the future?

2 more questions:
1. If there are already 7 sims in the house, does that mean that if a sim gets pregnant even with fertility treatment, the game won't let her have more than 1 baby (no twins, no triplets) if Overstuffed is not enabled?
2. InformonStoryAction is disabled for me, so I only get updates on the town when some random townie finds out that Sim X has a partner, but I haven't gotten the notification 'Sim Y has no romance victim'... Is that something I should be concerned about?

Thanks yáll!