I fuck my stepson's girlfriend while he was getting massaged

My stepson wanted me to meet his girlfriend, so he brought her to my massage parlor. I wanted them to feel relaxed, so I offered to massage my stepson's girlfriend while a female masseur massaged my stepson. While I was massaging my stepson's girlfriend, I got carried away and started caressing her tits. I ended up fucking her pussy after she sucked my cock.