What was supposed to be a straight [mfm] 3some ended up a kind of cuckold situitaion

It started off with my post. I posted an ad on craigslist looking for a couple to play with, because of my size I attracted couples looking to spice up there sex life with a bigger cock easier than I attracted singled females. So a few hours after the post went up I got a email that said, “me and my girl are going to go out for a few beers….we are attractive 40’s. wanna meet up in a bar? I’ll have a blur button up shirt on…not tucked in. where are you? lets meet.”

I wasn’t looking to meet that night and the post said as much. I reminded them that I wasn’t free that night but was interested in meeting. I told them I would be free the following day if they were. He responded back with “ok dude…we will be at just jakes tomorrow….at noon…drinking martinis (the glasses will give us away). what will you be wearing?BTW….she is salivating for that cock of yours in her mouth.” He had attached a picture of her.
She was a brunette with a slim figure and about C cup sitting on a sofa with her head turned to the side hiding her face.