Taking your nieces on vacation

You're our fairly wealthy but single Aunt/Uncle, we're the daughters of your sister, who is a struggling single mother.  You were always there for her, and us, showering us with gifts, and affection.  This year you decide to take both of us to a beach resort (you pic the place), but it turns out it's a couples resort, and the only people who aren't couple is us, not that you mind  

From here we can go a few different directions, maybe both of us (Vic and Mogan) are a little sexually repressed and inexperienced.  Maybe since I was older you've been taking me (Vic) on these trips for a while and now only Morgan is the one who's inexperienced.  If you're playing as our Aunt, maybe you introduce us to a hot guy friend?  We're also open to your ideas!