Naughty sex-addicted student fucks next to her to have a threesome with a stranger

They asked me for sex when I was heading home after college, but my step sister was already home in her room, even so I didn't let her tell me that I couldn't fuck, it was my day... then I convinced her not to say anything and that if she wanted to stay, she could stay or rather join in the fun, it was my decision to enjoy the delicious food they offered me, uuff in the end we all enjoyed it.