Should I stay or should I go?

Disclaimer:
So, let me start by saying that I may, quite frequently, find myself eating my words or putting my foot in my mouth, sort of speak. Please pardon me if this happens as this blog will be, for all intents and purposes, a sounding board for all of my thoughts, albeit irrational or passive-aggressive.

That being said...hi! Welcome to my blog. I'm just going to jump right in and say that I may have just had a break through...well, within the last 24 hours or so. My ex, who we will call MM, text me yesterday and asked if there were any job openings where I work...for his girlfriend. A weird question, some may say, if all someone knew about the situation was that we dated, then we broke up, and he then started dating someone else. Nope. MM and I have been sleeping together, on and off, for almost 4 years...while he's been dating another woman.

<pause>

I accept complete responsibility for my contribution to the dysfunction that is the situation between MM and myself. Some may call me a whore, slut, home-wrecker or worse but honestly, unless you've been in my shoes, don't assume you know how it feels to have been where I've been or where I am now. I've made bad decisions but at the end of the day, I am still a good person...just not the brightest. :)

<resume>

So, having been blindsided by the request to find employment for his girlfriend, whom he cheats on with ME, I was naturally speechless but managed to utter a "...nope" response to his text. As of late, I've found it hard to detach from MM, not because I'm still pining for him but because I've got needs that I would rather be satisfied by a man, and he's the only option. But this latest stunt has left me pretty grossed out but unsure of how to proceed. Do I call him out or just let it pass?