More important, when Ami will ride her gilrfriend?
I don't know about riding necessarily, but here's a preview of a fourth wall breaking moment where ami finds a long riders "doujin" later in the series...
This is a real page and that's the actual text, this isn't a joke XD
There's also some stuff with hinako and yayoi too, later. There's a whole scene where yayoi has a cramp and hinako has to help her stretch it out, and the panels are conveniently angled to make it look like they're... you know... and ami even says "should... should they be doing that in public?"