Stepmom's oral skills during a phone call with my girlfriend

As I was chillin' and chatting on the phone with my 18-year-old babe, my stepmom decided to join in on the fun. She's always been into me and my cock, so when she heard my conversation with my girl, she knew it was the perfect opportunity to show off her mad oral skills. She's a MILF with a big ass and big tits, and she loves riding my dick. So, as I was talking to my girlfriend, my stepmom came over and started sucking my cock. I was surprised, but it turned me on. I could hear my girlfriend on the phone getting turned on too. It was a hot moment. My stepmom is a fat BBW, but she knows how to handle a dick. And my girlfriend can't even compare to her in bed. I hope my girlfriend never finds out about my secret affair with my stepmom. But until then, I'll keep enjoying the amazing blowjobs she gives me while I'm on the phone with my girl.