I'd go with 1 and 3, the first mainly for Mom and Veronica and the latter for Ashley. It's not bad to have a scapegoat characters and it would work out pretty well for Ashley, it doesn't feel forced. Mom is still conflicted and I don't think it would be a good idea to rush things here, just keep a nice pace and please don't go the Big Brother Mom route with all the "oh my god, this is all soooo wrong, I don't know if I can do it" or some shit like that, it gets old pretty quick.
As for Veronica I think you should play the dom/sub card more, if she continues to be a good girl she may get a bigger reward next time like he promised her. Since the MC isn't supposed to be experienced he may ask her for lessong after she takes a shower in the evening. Just don't forget to play it the right way as in "You want to be a good girl and help your master, don't you?" or something like this, otherwise it may seem strange, but I have no doubt that you'll come up with something better on your own.