The title seems like an interesting life motto... (I have already made a "Just do it!" joke within the last seven days, so I'm prohibited to make one for this release)
You made your weekly "Just do it" joke to the same story as me (in fact you made yours commenting on mine), so technically you aren't allowed to make one either....
I don't think the cheating tag is warranted. Sure, her son may feel weird about it, should he find out, but there's no mention of a father anywhere in the picture.
Title giving some great advice, yeah?
Just replace 'it' with 'her' and it's perfect.
Also...It was all according to her plan, eh? In a way, her son was quite the wingman, allowing them a chance to be alone together.
Great ending. Whether or not he's around, eh? I'm sure he'll be wondering why his friend suddenly wants to come over a lot.
However she is apparently home during the day fooling around and there aren't any indications that they're wealthy. So I think it's hard to make the assumption either way.