I know exactly what you mean. My GF and I were into a long wet session and were in a great 69 with her on top, and I was lost in the oral from clitty to butthole when we both came at the same time, she squirted right down my throat as I came and she always swallows.

I couldn't help laughing as I was post cumming twitching in spasms, but she was ecstatic as she sat upright and just giggled constantly, while she kept hold of me and occasionally just had to bend over and kiss me there tenderly.

It was such an amazing moment that we only recreated once more, it was as if she was embarrassed about it, but I loved it.