Oops! Seduced my sister's boyfriend!

He was on his way home from work and he caught me on his way to my sister's. He said I should dress warmly because it's very cold - said and done! As an excuse, I said I needed a little more time to get ready and that he should come up to me and warm up... When I got to my apartment, he probably couldn't believe his eyes! Would you have missed such a fuck?