Yeah, both "Angel" and "Devil" (secret pics, plus other pics on Matt's Sharegram) are Richard's exes. What we don't know, though, is whether Matt preyed on them after they broke up with Richard, or when they were still with him (for "Angel", I mean; he obviously didn't know "Devil" before, but "Angel", it's possible that he was the cause of her breaking up with Richard).
Recently checked out a site that seems to be written by a real life Matt. It's an eye opener. I used to think that this plot is kinda bs, but after reading the guy's blog posts on how to pleasure a woman... maybe not.