Long time listener, first time caller here...
It doesn't seem like a stretch to say that raping women (and feeding on their fear) is at least part of BOB's modus operandi. If we accept that BOB has "been along for the ride" since DoppelCoop left the lodge then it would be kind of odd if he hadn't done any raping in the 25 years that he's been running amok in the world. I don't like the idea either but it does feel pretty inevitable, given everything that has come before.
It's also worth considering he did it "strategically", in order to sire a son (who he ended up using as a canary-in-the-coal-mine in this episode) and to gain some kind of mental control over (Doppel)Diane.
Anyway, love the podcast and the lively discussion on this forum!