I think it's very optimistic to think any actual romance will blossom with Jade. It's true that MC will soon be the only man in her life, and she may start to feel something for him. But I don't think MC feels that way. Sure, they have that text exchange where he says they can be more than just lovers, like they can talk and confide in each other. Maybe a real friendship an happen.
But Jade is like the Bella path with no real emotion involved. Pure "hot for teacher" sexy milf, played pretty straight. Like in terms of feelings, the order is:
Bella
Nora
Cathy
Jade