Where can I find an institute for this woman's daughter?

Where can I find an institute for this woman's daughter?

So yesterday at church this horrible girl that goes to inclusion time in my perfect princesses class room was there again! ( She has Prader Willie Syndrome and is an embarrassment to my angel). The young lady stood at the refreshment table and cramed her face, yelling at people if they tried to get some food. My perfect princess was beyond angry, but said nothing to her or her mother. Once home, my angel called a family meeting. She stated that she felt pitty for the fat slobs mother and that we, as a family, should encourage this girls mother to send her to an institute, so that she ( my perfect princess) would be rid of seeing her and being embarrassed by her. My husband and I think this is a wonderful idea ( our angel is perfect and knows so much more than we ever could). However, I can't seem to find any institutes in the USA. Where should I look? I want to be armed with the information for this Sunday so I can give it to this poor woman to help get the slob off her hands.