Just so.
Another thing to consider is how Ann's back story plays into this. Both Ann and Kira suffered some sever childhood trauma as kids. This is how Eric was able to manipulate Ann so easily. Eric is an experienced conman and predator who recognized the signs in Ann from the start.
One could surmise that this trauma had a big part in who Ann raised her kids. They're all a little broken, not just Max. Though Kira had a less traumatic experience, I expect her earlier inability to keep a job was related to this. By acting in porn, she is able to express her urges and take control of her life. I can see where she can view this process as liberating her family as well.
Compared to many of the other rendered games out there (like Milfy-City, or Long Live the Princess, for instance), molestation of sleeping friends and family members is a very minor aspect, only a blip in the overall story.
Max may be a bit lower in character than MC from Sumertime Saga, but he's way above some of the characters out there, IMHO.
That said, I would have liked to see even more romance.