Intense pleasure from witnessing stepson's ejaculation while recording my own orgasm

I've always been a huge fan of big cocks and my stepson definitely fits the bill. I love watching him pleasure himself, his hand moving up and down his impressive shaft. It's so hot and it's not just because of his size, but also because I know he's thinking about me while he does it. It's like we're playing a game, him pretending to fuck me through the door while he's jerking off. It's a strange sort of cuckold fantasy for me, but it works. So, while he's busy recording his own orgasm, I can't help but get turned on too. Seeing him cum is enough to make me climax as well, my fingers exploring my own body, my lips wrapped around his cock. It's a sight to behold, his big cock shooting ropes of cum all over the place. It's a sight that's sure to leave you begging for more.