Last summer me and my bf was staying at one of our friends house, we’ll call her Anne. Anne and another one of our friends went somewhere for a little bit and me and my bf were waiting for the two to return in the meantime we got horny. Me (18f) and my bf (22m) started touching each other and eventually we started removed our clothes about to fuck, when suddenly her brother, knocks on the door and opens it. At that point we had our pants off and quickly pulled the blanket up. He came in got his bowl, said something and then left. We continued after. Not sure if he knew what was happening or if we were quick enough to not get caught.