Stepsibling Mutual Masturbation Talking About Stepmom

I walk in on you trying to hide the fact you were wanking off in your bed, is that why you spend so much time in here? I grab your laptop to see what you were watching but can only see pictures of our stepmom. After some teasing, I came to realize we had something more in common than I thought. I fantasize about step-mom too, lying in the room next to you, fingering my pussy in bed, thinking about all the dirty things I'd want to do with her. Now your own step-sister is sitting on your bed talking about all the fantasies she has about your stepmom while fingering her pussy. How fucking naughty does this feel, jerking off together, just wanting your step-mom to find you both and join in?