I think so, that's what was hinted pretty heavily. What I don't understand is why her brother is even bringing all this up and what he wants to achieve by that.
1. Erase the suspension they may have when it comes to him. Rather than denying anything happend to her, it's smarter to just claim it were other people.
2. I'm pretty sure in the beginning it was said that that mf and the ML were fighting against the Pope and shit,, so him saying that shit is to make the ML angry against the Pope and his ppl and to make the brother seem as the good guy, who raised her etc
Thing is, what happened to her with monks might be true and the brother was obviously hinting at it heavily. He might be completely lying or he could be just sharing what the pope did to look like the good guy without mentioning any of the traumas he inflicted on Rubi.
I'm banking on him lying,due to their last name
Fair
She was still a bastard of an important figure born out of wedlock. And this story takes HEAVY liberties with historical accuracy. By that I mean you won't see much beyond a few names here and there lol
Did the monks sexually assaulted Ruby when she was a kid?