"This isn't the first time my husband's cheated on me, but you're my sister! You'd better have a better explanation than this magic lamp."
"You know how you have to be specific making wishes? Well, I was really horny and asked the genie to have the world's biggest penis....ended up with a concert pianist that's seven foot tall. Nice guy. Next time I tried, I asked for the world's biggest cock, that was fun but the poor rooster died. So I asked for the world's biggest dick and that's how I ended up on top of your husband."