EXPERIMENTING with STEPSISTER! How long can I last in her tight pussy?

I’m just lying in bed when my stepbrother comes and wants to talk to me. Well, I’m intrigued. He tells me he always comes too quickly and that his girlfriend has already complained. I can’t give him any advice, of course, but I wonder how long he could last in my pussy. So I give it a try. First he fucks me slowly spooning and then after a few minutes he switches to doggy style because he can hardly stand it. Now I lie on my back to see how far we can take this game. He stays in my pussy for a short time and as soon as he starts fucking me he has to pull out again and cum on my pussy.