NPH-137 - Couple swap, met my ex-boyfriend at a party after a long time.

I attended a swapping party at a friend's invitation. My ex-boyfriend was there, and after some physical contact after a long time, we both got aroused. We hugged naked in the bathroom after a long time. We had sex in a private room. She arched her back repeatedly, and her mouth wildly moved on his genitals, becoming covered in saliva and highly aroused. My husband was with another woman, and my ex-boyfriend's wife was with my friend. After finishing, I was excited to see my ex-boyfriend's wife with another husband, and it was a swapping party where everyone had sex with each other's spouses.