WCIF- A working "care for self" fix?

I feel like I never get to enjoy the game quite as much as I'd like to because I usually play large-ish families and every time I send a Sim out on their own to do something, everyone else's motives bottom out. Like yesterday I sent a Sim to sing karaoke for a few hours. Everybody back at the house was caring for themselves, allegedly, but when I finally sent the Sim back home three of them were close to bladder failure and all of them had at least a couple of motives in the red. I'd even kept her at the venue longer than I'd intended while I tried to make the ones at home do something else like skill-build or tidy and then go back to "care for self" hoping they'd finally get it together and use the bathroom already. But it didn't work.

I did find a "care for self" mod on Mod the Sims, but it hasn't been updated in a while and doesn't seem to actually do anything. Is there another one out there that makes it so that my Sims don't become completely miserable when they're left at home? I'm scared to go anywhere without dragging the entire family along!