3 year old Miniature Schnauzer (Erie)

I'm looking to rehome my 3-year-old spayed salt and pepper mini schnauzer.
We have been working with our autistic son on gently handling our animals, but she is not responding well to him.
She has begun to nip at not so gentle kids and our other dog if they play a little too hard, and we don't want anyone getting hurt.
She is a love hog with adults but will also just chill nearby when she's tired.
At this point, I think she would do best in a quiet home by herself and no young kids.
Rehoming fee applies.
Had all puppy vaccinations and is UTD on DHPP and Rabies.
Crate trained and housebroken.