sim's wont pick up or take care of child, and wont respond

Hi, Im having trouble with my sims, they wont pick up, or interact with one child but the will pick up and take care of another or will completely ignore both children. they will either accept the task or they will go near the child and then have an idea to do something different like sleep or go outside. I am also having trouble with another sims family, the sims will only stay in the bathroom and browse the web, and wont respond to anything. any help would be greatly appreciated. I've tried repairing the game multiple times, and that hasn't worked either. I really don't want to uninstall the app, and Ive heard uninstalling might help, but I only want to do that as a last resort. I've also tried restarting my computer as well. I got a few new mods yesterday so I don't know if that is an issue, or caused an issue? 

thanks.