Not alone

I leaned over karen, my length still deep inside. Slowly, i pressed in and out as i slowly hardened back up. " oh god yes, fuck me like my husband can't. Take advantage of me you fucking...." when my arm wrapped around her and i pulled her off the counter a voice came from behind us and we both froze.
"Karen?! I cant believe it! You kept telling me during our lunches youve had a fantasy of fucking around but my god." As i turned to the young voice. A woman no older than 23 stood behind me. Grinning from ear to ear. She had golden blonde hair in a ponytail. With cute brown eyes and dimples. She waved her hand as if to give me the go ahead.
"Dont mind me, i like a good show."
The mystery woman quipped.
My eyes examined the ponytailed woman. With her braless tanktop and tight leggings showing her busty athletic body .My cock grew harder than it had in a long time, much to karens approval as she moans while i slowly thrusted.