My[M24] autistic friend[F26] made some comments about her sex life that worried me. What should I do?

I've been friends with this girl since 4-5 years ago. She's a... Difficult person to deal with. She has a lot of problems socializing and isn't aware of some common social conventions, so things can be strange around her. Some time ago she was diagnosed with autism, and some of her behavior started making a lot of sense because previously everyone thought that she was only being mean/making things up just to be noticed. Since I started talking with her, I noticed that her life hasn't been... All that great: She was abused when she was 15, and used to "date" a guy that was much (much) older than her (and totally illegal), that left a lot of marks in her self esteem.

Currently, I'm her only friend besides her boyfriend (not the same as before, another dude), and her family neglects her a lot. So she doesn't talk with a lot of people, and that makes me feel kinda inclined to hear what she has to say even when things aren't that clear or she doesn't make much sense.

Now, her boyfriend: The guy hates me, because as I said, she doesn't know how to filter certain emotions and he took some of her behavior towards me (hugging me, being kinda close... That kind of stuff. Nothing too obvious, but things that in a more normal context could seem strange) as if we were "too close" and like... I'm sure he thinks that I want to be with her, even if we've been friends since long before they started dating (like 2 years ago). And don't get me wrong, I get why he feels this way. That's just a consequence of her behavior, but it has made some things difficult for me because I always have to be careful of how I act (and what I allow from her) around them, because he gets mad even if she doesn't realize what she did.

And that also applies to what I say. He usually checks her cellphone (and specially our conversations), and we had some problems related to him using things that we talked about to get mad at both of us.

And that brings us to what happened today: We were speaking through a whatsapp call, and she mentioned that her private parts were hurting. I asked why, and she told me "because of a lack of lubricant". Then, she told me "sometimes, when -name of the boyfriend- is too excited, he's too rough even if we're out of lubricant and it makes me hurt, but I don't say anything because I like to see him happy". And proceeded with an "But that's just because I forget to buy lubricant. It's just that sometimes I don't get wet at all, and I need lubricant for it to work". I then asked if this happens often, and if she doesn't realize that maybe she isn't getting wet because she isn't enjoying it. Her answer was "I usually get really sore down there. I don't know, I feel like even when it hurts, I'm enjoying it because he's happy".

And this... Like, I don't know. It's wrong in a lot of places. I get that she's in the wrong by not saying anything, she has a long history of doing this (because she's always thinking that everyone will leave her). But at the same time, as a guy, I think that I would notice if my partner isn't wet enough to do rough things. I fear for this to not be as "innocent" as it sounds, and for the guy to be doing this knowing that he's hurting her. But at the same time, I don't know if I'm overthinking it because I personally don't like him because of his behavior towards me.

Edit: Just to clarify, I usually don't talk about her sex life with her, but on the contrary. I try to not even mention the topic because I know that she has no filter and says stuff that could sound bad, and even more to her bf. This time it just took me by surprise, because I thought she was referring to something else.