I don't believe her BF has the correct... Barrel Length, to actually perform the action. Considering he has trouble giving her a good pump in regular doggy style, that is.
While on the topic... Any news if the guy is gonezo already? Given her usual BG vid posting times, we are already past due (I'd say from the timeframes, we were supposed to get one with him 2 months ago) for a video with the dude in it.
If it happens to be case, I wouldn't even blame the dude's potential insecurities. Out of shape and competing with dildos 4 times his size/girth. Can't be nice on the spirit.