So your ex is one those vanguards of virtue, too? My kids have to come to my house to get a decent meal and some attention. Sickening...
Sounds like the situation my brother was in. His 2 daughters were living with their mom (a big, fat, lazy money-grubber - an I am not exaggerating) in a seedy part of town.
When they came to my brother's house for weekend visitation, he would have nice clothes for them to wear while they were with him. The ones their mother bought them were shabby and trashy, even though my bro was paying around 2 grand a month in support.
But this story has a happy ending. My brother managed to get custody of the girls, but he basically had to out-spend what she was willing to spend in legal fees.
Yet another victory for my clan over those who think they can do evil to us and get away with it!
Oh, and incidentally, my ex-sister-in-law does not have to pay one little dime of support to my brother for their upkeep. Figures.