The first time we had an mfm we played for hours. Fingers, tongues and cocks probing every orifice. The horn and heat of the moment took over and all sense and reasoning left the room. I kissed my wife as my mate pounded her pussy. The grunting and groaning increased from my wife and my friend so I whispered in my friends ear, don't forget not to cum up her. The words from his mouth came out garbled but he basically said its too late as his arse tensed and his sperm spurted deep into my wife. The next word he spoke was sorry. My wife didn't care at this point and I tried computing what had just happened. My wife wasn't on birth control so a million scenarios flashed through my mind. It was at this point my wife realised he'd cum in her and begged me to fuck her. I quickly jumped on realising this event made my cock harder than I'd ever been before.
My hard cock slipped in her easier than ever lubricated by his sticky cum. I quickly added my load and flopped out while continuing to caress her body.
It was watching his balls and arse twitch that made me want every bull to fill her pussy. It's amazing to watch and the frill, danger factor added more horn.