Whats wrong with mating with a single mother excluding her obvious signs of fertility?

In my experience they are the easiest to catch. Im married and single mothers who know about my wife still advertise themselves to me. I do not really consider myself a high value man but I was definitely given above average genetics. Being married I dont advertise myself at all and act very secretive around others but literally every coorperate place I've worked I could have taken my pick of the single mothers that existed there. The ones that aren't fat would definitely pass as solid 8's and 9's if you found them back before they decided to give birth. Is there anything wrong with mating with these women while they still have some attractiveness left?

Im not sure if my location makes a difference, I live in a place of extreme poverty in the USA. For reference, the poverty line here is 29k a year and the average person only pulls in about 26k a year. So the vast majority live below the poverty line which is already ridiculously low in comparison to our national average. Even my male friends tell me stories of being "asked out at work" by some single mom and not knowing which ones to screw/ignore first. Even guys who are making like $10 an hour at the UPS mailroom have a legit chance at the panties from what I can see. Doesn't even matter if he is 5'8 and 120 lbs and poor. Those guys still seem to be able to get the single mothers around here so what gives?