He shouldn't, especially since the pos ow is hanging around. I would ask that she is NOT to be around your daughter when she is with him. Definately. She doesn't need the added confusion.
Of course she needs structure, and he needs a good swift kick in the azz
me: 37 H: 44 Married for 18 years this june S7 S3 porn issues, and much more... since 7/06
Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
