Thank you for your input, Onward.

Ultimately I don't want my mother to get sick.

I'm also intimidated by my stepfather, for various reasons, I wouldn't have the guts to confront him about something like this.

Right now it's 11PM where I live and he is still not home, my mother is out of town on business all this week. If he doesn't come home at all tonight (again) then I'm going to feel convinced he is having an affair and that much more terrified that he is going to get my mother sick.

My mother is a fragile, dysfunctional being, in some ways sinister due to how warped her mind is, but there is still some good in her, and still some hope for her, and I still love her in spite of everything. If she gets another huge blow to her psych/emotional health by going through the same **** again, she might implode, and it will cause me immense pain, too, because I love her, and I don't get to choose that, it simply is.

But at the same time I know it is likely to blowback at me hard, as family problems always have, I am the scapegoat, always have been and likely always will be. It's always like this.