I never said anything about the porn tapes. Just as I have no real problem with Chris wanting to run a (respectable) strip club, I have no problem with Danielle choosing to do whatever she wants with her sex life. Like you said, it's not illegal. What I have a problem with is her bringing Steve in to introduce him to them.
My relationship with my mother is more that of close friends than that of mother/daughter, and sometimes it is quite unsettling. However, it's your prerogative to think she's a good mother.