Not sure how to feel??

So my husbands aunt/uncle and cousin have not acknowledged us or our children the past 8 months. Finally I reached out directly and privately to the cousin to see what was going on. She told me that my husband raped her when she was 7, he would’ve been 9/10. They are both now I’m their 20’s. I don’t k ow how to feel about this. Like part of me is disgusted the other part of me is confused because he was a child himself and how did he even know what he was doing was right or wrong? knowing the way he was treated as a child makes me believe he may have been sexually abused as a child causing him to think it’s okay? I have absolutely no idea and I feel crazy questioning my thoughts on this. May I say also that this cousin stood in our wedding has been very involved in all of our lives and vice versa. I’m just really confused and don’t k ow what I’m supposed to think. It truly upsets me because my children are now being treated as if they did something wrong and have no idea what’s going on. Like did he actually rape her? (Penetration) or was it more molestation. I feel so stupid right now I just don’t know what to think. I look at my husband and I don’t even know what to think.

***May I add I myself was molested as a child. I was 6 my cousin was 14, he clearly knew better. I also have to add I never told anyone and never did anything about it because the memories are so foggy I can’t 100% say what happened. Not at all saying that’s okay that I never said anything and not implying she shouldn’t have said anything, I just don’t understand why his parents aren’t being ignored and rejected. My children have been involved in these peoples lives for years now all of the sudden this is put out there and we are being treated as if it’s our fault or as if they did it. I just don’t feel it’s fair to them. I can understand not wanting to associate with him. They have no problem with his parents or sister, just my husband me and my kids. I just know how he grew up was far from structured and he was never taught right from wrong and I don’t understand why he is the only one at fault here. He was a child. I just don’t know how to feel or think about this. I have always been all for women coming forward and on their side but I just don’t know how to feel or how I should feel.