reversed-copycat

Someone who makes you look like you're copying them (most of the times a "popular" person). Say one day you realize you have a thing for mom jeans, but you can't quite get them at the moment. Coincidentally some time later, they walk in wearing a new pair of vintage Levi's, and when you finally decide to buy a pair it looks like you copied them, especially if these kinds of events occur often.

She's such a reversed-copycat for buying mom jeans.