Preferably in the throat, but the person delivering it will be badmouthed by the DA a lot. Best to pass on the pleasure of delivery, just think about it.
OTOH if you have a boss who'll put up with it you could simply start repeatedly asking about something she thinks is private when she pings on the $ subject. Sex life is good if it is a button for her, but you need to be of the same polarity to make it work. Press for DETAILS like frequency, stamina of partner (Just 3 times a night, how sad..., you have my sympathy dear. ), # of partners this week, etc. Whatever is the hot button for her. If it's not sex it's something else, you'll just have to find it. I get that she's hitting on husband $ not yours, so the "don't" talk about salary" rule may not work effectively here. Eventually it'll sink in. Like training a dog, sometimes you just have to rub their nose in the mess. Be sure to let line supervisors know it's coming ahead of time , and why. Once you get their blessing though there are NO holds barred.
I once had a co-worker who spent half the day praying AT folks. Now while praying for, or with, somone is generally a good thing being prayed AT for weeks on end gets annoying and decreases work time. Several of the co-workers had pinged on him to cease and desist, including the company owner. He stopped after a couple of co-workers filled out EVERY coupon for free samples in a Hustler and a few other various polarity adult mags in his name. The number of "plain brown wrappers" in his mailbox finally got his attention, and his wife's. Our problem stopped. So did his, after a couple of years. Mailing lists seem to take on a life of their own....
FT