The ad said that this new and improved formulation was guaranteed. You couldn't believe it, and even more than that, you couldn't believe you were falling for it, spending $100 on a so-called "truth serum."  The website--also dubious--said that the serum helped to "transport the taker" back to the time you wished to question them about, putting them in their past self, in a way. Perfect for you purposes: getting your mother to finally tell you about her past, and about your dad.  She's been so closed-off about it, although you hounded her for years to tell you. She swore she knew who your father was, but that it was all part of her "past" and now that she's found her Lord and Personal Savior, Jesus Christ, she doesn't want to go down that road.  So you slip it into her water. You know she never finishes a full glass so you double-dose, although the label says that "excessive doses can result in regression," whatever that means.  You quickly learn what that means: your mother has been entirely transported, regressed back to the time you were asking about--the time she was finally being honest about!! And god, what a fucking past it was! You had no idea your mother was such a wanton, insatiable cum slut. You had no idea she was so slutty, so willing to fuck anyone who so much as smiled at her. And yknow what? She actually thinks you're pretty cute...and sort of familiar, too...