"Yupyubiii! Shukyukyuiii!" "Why are you rolling around while you poop, ze! It's dirty, ze! It smells, ze! You've got to take it easy when you poop, ze!"
Hmmm... She's supposed to care for her children as much as Reimu does, but Marisa is getting worn out. When I try to help, she says "Don't interfere!" and doesn't listen to me. Eventually, either she's going to snap and start abusing the kid, or she's going to be crushed by her own sense of responsibility. Either way, it looks like she can't last much longer.