Should I be worried

So since tomorrow is V day, my boyfriends ex girlfriend invited both him and I to a group date with her and her boyfriend. Her boyfriend is also my boyfriends best friend and her and I aren’t cuz yeah we just aren’t at all period. It was just out of the blue that she invited us. But my main concern is will she flirt towards my boyfriend or something. Like am worried and all over the place figuring should we go with them ?? Should we not ?? Is he going to try to get back with her like I seriously have no idea right now