Well, if you read this TV Guide story (some spoilers in there might not have shown up yet) the actress portraying Janet seems to think that there was more to that little encounter than it actually looked.
Personally, I came away feeling that Tommy did that solely to get back at Johnny, that Johnny knew that was going to happen, and that Janet knew it too and might have played into the whole thing by getting Tommy over alone and ensuring that Johnny wasn’t present. It’s not as if she couldn’t have arranged their meeting on neutral ground, with other people around.
Of course, that could just be my loathing of the Janet character showing.
I’m more afraid that they’re mirroring this Janet-likes-it storyline in Probie’s storyline: Janet gets raped; she ends up liking it. Probie got raped; he’s becoming bisexual. :rolleyes:
Really the whole Probie storyline just leaves me… nonplussed.