After a few threesoms with men and wife she asked if i ever thought about sucking any guy and told me it would turn her on big time if i would give it a try. So during our next mmf i told her to sit on his cock facing me so i could lick her clit and his cockshaft, i started just licking her clit and i could tell he wanted more so i licked his cock and her clit they both really got in to it so after a few minutes i reached up and pulled is cock out of her and took it in my mouth and slowly sucked it and then put it back in her pussy. I did this a few times and could tell he was going to cum so i gently squeezed his balls and felt him contract and shoot cum in her pussy i pulled his cock out and put it in my mouth and jacked and sucked the rest of his hot sperm and swallowed it. Then i berried my tongue in her pussy and ate her dripping pussy.
We all three have done this many more times over the years and i have sucked his cock many many times and probably eight or ten others.
And that's my how i became Bi story, i love sucking cocks and swallowing cum.