Maybe someone else can elaborate on more this. You just have to keep your relationship points and love points high with the girls (with giving Gifts, using Cheat menu) and do their dates on the weekends. Eventually after that happens Nicole/Mom will basically dump Bruce/Step-dad for the MC. It can happen regardless if NTR is on or not. I played with NTR on and just made sure the love and relationship points were high.So NTR is off, and yet part way through the game I hear a noise, and one of the gang members is fucking the mother.
How is this NTR off?
Also, there is still a bug where while on love path, a drunk Cassandra appears in the basement with Frank the salon owner at 5pm.