Have you ever wanted to get caught?

One Sunday morning my husband then my boyfriend were having morning sex when my sister in law stopped by to invite us to brunch. We had just finished repainting the front bedroom we were in. The bedroom door was a back door to the outside with glass panes up and down. We hadn't put up our new curtains yet. There was only a sheer thin white see-through curtain. She knocked softly and saw we were fucking. I ignored her as if I hadn't heard her knock. Instead of leaving she stepped to the side and watched us through the glass. Knowing she was watching I stepped up the pace and began moaning with every thrust. She stood there and watched us to the very end then quietly left. I was so turned on being watched.