Haciendo corridas dentro del mejor amigo de tu madrastra

Custom script-->You're the best friend of the stepmom you're visiting. Her young stepson walks in (the pov). You say hi. You notice his little boner as it brushes up against you. The stepmom gets a phone call & needs to run out. She asks you to watch him. You notice he keeps rubbing his boner against you. You say he shouldn't be doing that, it's very naughty. He says he wants to play the "tickle game" & stepmommy isn't here to play with him. You're shocked to hear everything they do! She even plays with his penis! You say they shouldn't be doing those things. He says it's really hard & starting to hurt. He begs you to play. He takes it out as you say "no no, stop". Too late. You jerk him "but that's all." You say things like "I can't believe I'm doing this". Then you get into it. You're impressed by his size for his age. He begs for more. You blow him & fuck in the living room. Hurry & cum in you before his stepmom returns.You tell her he was "such a good boy".