Jade is clearly way more into Lisa than she is MC (who can blame her) but I think a Jade/Lisa/MC 3-way will only happen on the Lisa path, if you want it. Mr.Jet said he plans to link the main-girls to their receptive side-girl, so it doesn't make sense to get that 3-way if you aren't on Lisa's path.
I kind of expect her to watch Lisa/MC bang, and get caught. Which will lead to an awkward conversation and then eventually, a 3-way. Or Lisa and Jade start messing around, and then Lisa asks MC if he will be ok with the 3 of them doing stuff together when MC catches them.
The more interesting thing will be how does Nicole and Jane work? Mr. Jet said the two of them are also linked, as are Anna and Catherine (the boss lady) and Selina and Rosa.
Also, since we can officially start relationships with Selina and Jane, do they get cheat points now? Or is that still a Lisa only thing? And I wonder how that will impact Lisa-Jade 3-way stuff.