Surprised step-uncle masturbates while spying on me

I've been living with my step-uncle ever since my parents split up. He's been acting kind of weird around me lately, but I figured he was just stressed out about the divorce. As I was taking a bath the other day, I felt someone watching me. I looked up and saw my step-uncle peeking at me from behind the shower curtain. At first, I was scared, but then I saw him stroking his huge cock. I was so turned on by it that I started playing with my own tits. He loved it and kept jerking off harder and harder. He even joined in, groping my big boobs while he was masturbating. The sight of his monster cock cumming all over the place was so hot that I couldn't help but get wet. From that day on, we've been fucking all the time. The risk of getting caught only makes it more exciting.