i don't know how far you're taking the scam thing but i think lyn would find it kind of hilarious, so if you're up for it/if it works with what you have in mind, maybe lyn was in the same coffee shop or some other public space as one of nikki's marks was happenstance running into her and trying to confront her and lyn overheard, took it upon herself to jump in to play alibi or something, and now they're friends?