My sister wouldn't let me fuck her without a condom but asked me to nut in her ass.

In the heat of the moment, my sister and I were going at it. She was down for some doggystyle action but insisted on a rubber. No problem, I thought, as I slipped it on. But then she whispered, 'Why don't you finish in my ass instead?' I grinned, pulling out and tossing the condom aside. She arched her back, ready for me to blow my load deep. It was a wild ride, and she moaned as I gave her what she wanted, raw and unfiltered.