[OzHarley]

My partner and I have done this many times, mostly her on the phone, but sometimes me.

This first time it wasn't open and loud like you asked in your post, we kept the noise down a bit while she was talking to her ex (still married back then). Her and her ex were in an open relationship and they both plays games with each other. In this case I was just the new guy, with the new cock, fucking her from behind one night when she stayed back at work to help me 'clean up'. I didn't know about their open relationship then, so I kept quite and slowed the strokes down at first when she answered the phone. She talked for a couple minutes, seemed like hours! By the end of the conversation on the phone, I was pounding her harder and I'm sure he heard a few moans or yelps! I found out later when she go home, she confessed why she was late and that when he rang, she already had my cock in her. That triggered them for more hot sex. A game they played, which I now play with her. Debrief sex is fucking great.

Next time, was almost the same scenario, the following night. She stayed back at work, helped me clean up and we fucked. He rang again. This time she openly said, she was running late as I was behind her fucking her. I got to yell out, hey mate. They only fucked a little while that time. I didn't stop, I was going hard. Finger up ass as well. She ended on her knees about to take a load in her mouth and told him that she had to go and swallow some cum. That just made me cum quicker. Fucking hot.

Since then lots of times, with him on the phone before she left him. Then with other friends on the phone. Great fun.