I think it's totally possible. I'm in the same situation and my friends mom and I have "done it" on several occasions. just don't tell your friend and nobody has to know
Show up on her doorstep with a pizza.
When she opens the pizza box she sees your dick poking through the hole you've cut in the pizza box to shove your weennie in there - lol
Hey, it's working in those videos.
You mother-fucker - literally LMAO
But seriously, is this some sort of hilarious evil revenge, or you really have a weird fetish for women who are as old as your mother?
Has she ever shown even the slightest interest in you? The only way it is possible is if she is consenting, and if she hasn't given you indication that she's ever even considered it then you're likely to get rejected, piss off your mate, and end up looking like an idiot.
Yep, I think I'm going with mongo on this. If she doesn't at least show some sort of sign, it's just way too dangerous to even try and engineer a situation because that will be extremely dodgy in itself.
How old is your friend's mom? Reguardless, if she's a hottie, I'd say go for it. You should make sure the sex is willing. Does she flirt with you or anything that would make you think she's interested? If she's hot for you that makes the infatuation even better.