Surprised and exploited! Mega cumshot from stepbrother!

When I cum home today, I went straight to the office after the shower to continue working on the renovation. Because I had the day off and I was already so warm from the shower, I just started in my underwear. I didn't plan for my stepbrother to catch me like that, but I took advantage of it anyway! He fucked me hard and at the end there was a delicious facial insemination. What would you have done to me in that situation?