Dude...just go to the many watering holes around town...get drunk, bring ANY girl home (does it really matter, since you're not looking for love) and in the morning, round 9 o'clock when you're getting YOURSELF a drink of water......tell her she has to leave asap cuz your ex wife is about to drop off the kids
She won't say a word (she'll be too stunned at why you didn't tell her last night, and too embaressed to admitt she just got screwed). She'll grab her shit and leave so quickly you'll think you slept with Secretariat
You rock man, the best post I have read in a long time anywhere