Yep, they totally dont take care of the babies unless you get the relationship up with it. I found you have to (time consumingly) show the parents at least once how to care for the babies. After that they get better with the next ones. But I had to use pescado nodroptiredbabies hack and a busload of others before I could really enjoy the game
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A shortcut is to use the relations adjuster and make the relation high between the parents and the babies then they take care of them much better. I also found (from playing it different ways) that if Mickey dotes on Riley, instead of allowing him to sow his wild oats everywhere, Then he becomes much more playful and caring with the kids. In my game he took better care of them then Riley, so I guess it varies.
Christanlov's all in one nanny & (all in one npc) solved all that for me. Here's a case where simblender isn't compatible but the insimenator works like a charm.
I have awesome houses in that game that I wish I could export to TS2 and really miss the treadmill and cell phones and some of the decor & wallpapers. Riley's house has about 4 stories to it & her and mickey had six kids in my game. I can transfer my dloads folders between computers and games at home but I haven't figured out how to package lots & don't know if they can be. Wish I knew because I have families from there I'd like to move to TS2 game.
It was convenient for me when I finally got TS2. I just moved my SLS dloads folder to my TS2 game when I upgraded since I had all the custom eyes, bodies and skins & hacks I loved in it already. I guess if I get UNI, BV, OFB etc I'll need to make changes but in this economy I'll probably be enjoying what I have for quite a while.
I wish I could show you some of my old saved sls games (I saved a few favs) so you could see how similar mine was to ts2.