<human>: My best friend had a house party while his brother way away at uni and parents away with work. Events led to me having sex in his brothers in his brothers bed, my best friend knows but for obvious reasons he didn't tell his brother. The funny part is that I didn't change the sheets and the brother came back the next day, potentially sleeping in my semen. The brother seems to think I get no action, I don't comment as it amuses me that he doesn't know what took place in his bed. (What is also even funnier is that at subsequent house parties many more acts, not by me though, have been committed in that bed.)

Condense the text into a few key points
<bot>: I had sex in my best friend's brothers bed at a house party while the brother was away at uni. He is none the wiser to what events took place in his bed.