Step Fathers Tease

Since Mick moved in, then married my mum three years ago, I've wanted to feel his long thick cock fucking me.
I've even watched him fucking my mom several times. Sometimes they haven't known I was there masturbating while watching them fuck. Other times Mick has seen me, but has never said anything during or after they'd had sex.

Recently Mick and I have been spending more time together as my mom has been promoted at work.
It means she's often working late, which gives me time to tease and flash my step dad.
I like to sit next opposite him on the sofa, spread my legs wearing a short skirt, but don't put and panties on.
I know he's seen my pussy many times now, and I've watched him get a boner.

Only last week, I caught him staring and touching himself as my pussy was on display to him. His cock got hard in his comfy shorts and I could see a wet spot where pre cum had probably leaked out of his beautiful dick. Later on I heard him talking on his phone. He didn't know I was listening in and I definitely heard him say "I'd love to fuck her, but she's my step daughter".
I'm not sure who he was talking to. What I do know, is he went into their bedroom and masturbated.

Now I just wish I'd have walked in on him.
Possibly next time we're alone.