Step-siblings share room after many years without seeing each other - some things have changed

I am in my room when my stepfather arrives with his stepdaughter and I see that the years have changed her a lot they ask me the favor to stay in my bed since there is no room elsewhere I eagerly accept she undresses to go to bed and I can not help but get horny she notices and finishes doing everything possible to get my semen with her tight pink pussy.