I believe JCrusher is correct, but i'm not sure if Shannon (aka Sandy) was Neils stepdaughter or his biological blood daughter. I've read conflicting info on that.

Aniello Dellacroce's second wife was Rosemary Connelly. Rosemary had 3 children from a previous relationship, 2 sons and a daughter named Shannon aka Sandy. Some say the daughter Sandy and one of her brothers were fathered by Neil.

Shannon (Sandy) married Ernest Grillo. Gotti started banging her and they allegedly had a child, a daughter named Meagan Grillo.

So it was Gotti who broke another rule and was screwing another made guys wife.