Nice flipping of roles as one gets sick and the other gets better. It didn't feel as if you got them sick just to make them confess. It's a good story even without the romance. (I like stories that have a strong romance component, but romance alone will not enough to hold my interest.)

Good explanation (smiling) why Mark and Princess act as if they're together. Princess's support for Mark fits her personality (even though in my universe they get together). Novel reason for Jason's lack of success with women. I also like that they aren't rushing into it. Maybe Mark is assuming a bit much, but the romance will (or won't) develop at a realistic speed. Not confess on Monday, marry on Tuesday, divorce on Wednesday.

I wanted to make sure this still worked. Considering you don't normally write slash, you did a fantastic job with that prompt. It doesn't have to be x-rated to show the emotion.