I Think I Got Pimped.

I am a stoner. My brother is a stoner. My family are all fun loving stoners. lol

So I was at party with my younger brother (19) because he said there would be some fun shit there and and was down to get high maybe find a cute guy.

It was a fun party and I was super high, and my brother introduced me to his buddy Dan and we got talking and Dan said he had some "really good shit" he was willing to share so we found a room and the three of us got super blazed. My brother went to "take leak" and never came back.

I was so high, and Dan was cute, and he tried to kiss me and ,,, well i am a stoner chicky and why not let a cute guy "hit it" with you when he shares "good shit." The sex was fine, nothing crazy, making out... head... me riding him... him finishing me bent over. We rushed to get dress incase my brother came back, and giggled all silly about what we did while so high. The sex was ok, but it was also just fun to do a random hookup at a party like that.

Much later in the night after we both were circulating again I went to grab a beer in the kitchen and saw Dan giving my brother and envelope and my brother thumb through it (like counting).

They did not see me. I walked way crushed.
Did my own brother just do that to me?

I don't mind being a stoner slut. I don't mind if by happen-chance end up laying one of his friends. But what I think just happened makes me feel betrayed and used.

Am I wrong? What should do?