Complicated

I agreed to drive my twin sister and her fiancé to Vegas to get married in my RV. I didn't expect to find her and my boyfriend in bed together not even twelve hours into the trip. The sh*t hits the fan and one thing leads to another. Now they've taken off on my Mexico vacation and I just agreed to go to Hawaii on her honeymoon with her ex. Except... we didn't plan to catch feelings for each other on the trip. Looks like things just got complicated.
A gay for you mm romantic comedy.