I wouldn't trust Charlotte's words too much in this matter. In the end, she successfully hid the fact of the attack on herself from her own children. And again, that doesn't change the fact that Charlie loved this guy. She's not saying that Suzi and Emma are the result of rape.
You're just hopping from one extreme to another, and probably reading too much into things, looking for something that isn't there. I imagine that at some point Charlotte did love the girls' father, but in the end, he abandoned them. She was then badly treated by a bunch of men in her industry, and horrifically attacked by one. It's not really a big surprise that she's wary around men and takes a long time to open up to a new man who has entered her life.
Also, I missed it earlier, but as she has two children, yes it means she slept with a man on at least two occasions (excluding any other fertilisation method). It doesn't automatically mean that she liked it though. That's not anything to do with the discussion, but I just wanted to point it out!