I see a mother and daughter spending an evening out together a reasonable premise to start from. Perhaps the daughter is a college student and home for a weekend-holiday visit and drags her mother out to a male strip review at a local bar. Needless to say the mixture of alcohol and male eye-candy bring the previously demure mother out of her shell and the daughter eggs that on with more drinks and inuendo about what she might do with such male partners. That situation alone is a boiling pot needing a good stirring and I leave it on the stove for someone here at Lit to serve up.....
Hottest thing I ever heard along these lines could not be done at Lit since the daughters in question are clearly minors. Woman I know insists that she thinks it part of her responsibility as the mom of two daughters to teach them to masturbate and enjoy thier bodies. She is also bi and sometimes does this with a girlfriend.
may have what you are looking for. My first story about my fantasies of my wife and mother-in-law...not that it would ever happen but it was fun to write. A few details were changed But the fact that they both have amazing racks is true =D
hit me with some feedback. Part 2 is being reviewed for posting as I type this.