Everytime I talk to her she asks me how I dealt wih Son's fingernails. She's having anxiety over her DD scratching her face. Niece isn't scratching her face to ribbons or anything drastic, but she is leaving very faint marks and that's making SIL batty. She's worried about scarring and she's even worried that her DD will find some old scratch 18 years from now and wonder why her mom let her do that to herself.
I suggested she talk to her doctor and/or attend a Mom group and I've offered to watch her houligans so she can get some alone time. As nicely as I could, I told her not to listen to her husband. He just tells her to stop worrying. Seriously, dumbass there's a deeper problem here.
MIL is thrilled you're joining the family.