Stepsister interruptes me masturbating her underwear and we have intense anal sex

I was casually chilling at home when my stepsister decided to interrupt me while I was pleasuring myself. She's got an amazing body with the nicest ass and big tits, and it's hard not to notice. I've been eyeing her underwear for a while now, and she caught me. Instead of getting mad, she decided to join in. It was a wild ride, and we went all in with some intense anal action. She's quite the squirter, and it was a sight to behold. The pleasure was off the charts, and we both cum hard. This was a taboo experience, but it was too good to pass up.