Would You Sleep W/ Your Childhood Friend's Mom?

I've been mulling over posting this all day, but I figured I'd go ahead and share / ask for advice. Soooooo, I was at the pet store today getting cat food when I saw my ex-friend's mom buying several bags of dog food (they own a kennel). I went over to say hello and we talked for several minutes. The normal stuff: how is school going, how is your work going, me asking about the family, etc. I end up helping her take the shitload of dog food out to her car. We pack everything up and she just stands there and gives me a weird look. She asks me, "What are you doing tomorrow night", and I respond with something along the lines of, "I'm actually going out of town, but I'll be back Sunday. Why, is ***** still home from school?" (I'm incredibly naive). She says that he isn't and she thought maybe her and I could "get together". Being the awkward moron that I am, I say, "Yeah, maybe." She decides this is great, has me put her cellphone number into my address book and grabs my hand and says goodbye before getting into her car.

Yeah. I have no idea what spurred that but, some background info: the friend was a childhood friend (probably my best for some time) that I played soccer with. We hung out sparingly throughout high school (he went to another school) but he turned into a neo-douche so I've only spoken to him a few times within the last few years. However, he did leave me a message about three months ago, totally out of the blue. I returned his call, left a message, and haven't heard back from him since. The mother: has aged very well. Having ridiculous teenage ideals, I don't think I ever really realized it. To give you an idea: she dated a professional baseball player after divorcing my friend's dad, so she has the typical athlete's girlfriend look of a blonde bimbo with breasts. Very conventionally attractive. Growing up with my friend, I always thought it odd that she had not one, but two very serious boyfriends for many years. They had to know about each other, and it didn't occur to me until later that they probably didn't care as long as they got a piece.

And now I'm here, wondering what to do. I wouldn't post anything if I didn't want to have sex with her. Sex would be the ideal route. However, I'm afraid of the karmatic retribution. This "friend" did contact me just a few short months ago, so obviously there's still a connection there. What if he finds out? My mom knows his mom on a first name basis, though I doubt they've come into contact in a long, long time. Am I missing anything? Is there anything else I should be worried about besides being murdered or accidentally scarring her son for life? Should I just stop being a pussy and have at it? Thoughts.