That girl is not a true friend of your gf.
She is more attractives than your gf and knows it. So she seduce
her "friend's" bf and have sex with him. And you like a stupid fool
fall into her trap.
You can bet that the girl is feeling so good about herself now. I
don't know why, but some girls like to snatch other people's bfs or
hubbies. Like as if they get some kick out of it.
For a girl like her, I can bet that she will bragg, your gf will
know sooner or later.
The best that you can do now is to confess to your gf now. Frankly
speaking, if I am her, I will not forgive you and will leave
you.
But you have to do it. Dare to do, Dare to admit.... BE A MAN about
it.
I don't think you should even consider that girl as a gf or a
"small". She is nothing but trouble.
For ONS, you should tell her it is a "ONS" before the deed and not
the next day then tell her it is "ONS". Must state upfront that
only play,play no commitments.
Did you use protection??? If not your trouble may be just
beginning, what if she come and tell you she is pregnant? Are you
even sure whether it is yours?? Should an easy girl, probably not
her first time. What if you get STDs???
