Because I'm a shitty shitty creator to my OCs, I eagerly await Jaspin saying a bunch of awful things to her in an attempt to utterly break her heart.
But the important thing is that he doesn't mean it.

Sexual tension is great.  That'll probably be what tips others off that they still love each other somewhere deep down.  Others like Rowland and Jonathan and Violet and Abigail.  All with their own reactions to that revelation with varying degrees of entertainment value.