I first witnessed this after we had had friends round for dinner.
We noticed our g/fs had disappeared after the coffee and went looking for them.
I'll never forget the sight of them both naked 69ing each other on the bed, after a while my wife's partner pulled away from my girl's soaking fanny, lay her head on the bed started moaning loudly saying to my girl YES YES YES DON'T STOP, then her face went all contorted and she started screaming loudly as she was orgasming.
Watching a very attractive girl doing that and witnessing your girl doing the same afterwards is the most incredibly horniest sight I have ever seen.
Needless to say we both jumped onto our respective partners and fucked side by side, once again witnessing the sounds of lovemaking and orgasm.
I reckon it must be mans utmost fantasy to watch 2 girls together.
Anybody else had such an experience?

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Ladies, let me fulfil your sexual fantasy.