At the end of the latest update Naomi disappears with a bottle of Serum and Janet appears to have locked herself in her bedroom with the MC wondering if she remembers her inappropriate behaviour towards him when he visited her. (Visit Janet's home yourself, at the end of the game, and try to enter her bedroom to see what I mean.) It seems likely to me, Naomi being Naomi, that as soon as she purchased Serum from the supermarket she immediately trotted off to visit Janet and both girls took the aphrodisiac at Naomi's suggestion, ending up locked behind Janet's bedroom door and getting feverishly jiggy with each other. Further, based on the effect Serum has had on other pairs of women (Naomi and Pricia, Emily and Alia) if the MC were to disturb them in flagrante delicto he will inevitably end up drawn into the action himself, as the male participant in an illicit threesome, which seems to be the outcome whenever pairs of women fall under the influence of Emily's potent sex drug.
(I'm sure Naomi would stage a show like this in order to draw Henry into a triangle with her and Janet if she could.)
To be honest, were this to happen, I would be conflicted because really hate the idea of a sweet and vulnerable woman like Janet ending up having sex only because she'd been roofied, with Serum, and hence not in her right mind insofar as free will and consent are concerned. I don't like the idea of taking advantage of a woman or a girl under the influence of a drug which interferes with her ability to make conscious choices. That smacks too much of date rape to me, which I find completely and utterly repellent, and therefore hope I'm wrong about this one.
The next update will tell. Janet is my favourite character and I really, really, really hope - that's a three really hope there, folks! - that NLT and his story will be nice to her.