Fapped to her girl while he jerked to mine

I and buddy have been friends for years now. And we have gfs since couple of years. This one night last weekend, 4 of us went out for drinking. Her girl wore a deep cleavage top and i couldn't stop ogling at thosw heavy tits. He noticed me a couple of times but didn't say anything. Next day, when we met, he told me that he had the greatest sex of his life the previous night. And i said yes, she was looking quite hot.

That's when he told me that he caught me staring at her tits. We are close, and I said you got me but she was looking hot. He offered if I would like to see her naked. And i was shocked! Never expected this. But knowing him, i said what's the caveat. He said I also have to show her my gf nude. I thought abt it was like fuck it. We went to the work washroom, got into a booth and started showing each other's gfs nudes.

We didn't realise when we started touching ourselves. But in 5 min, both of us were in booth, looking at nudes of other's girl and fapping the fuck out of ourselves.

He came first, and seeing him, i did too. We haven't talked abt it after that, have been normal. But I feel this may happen again.