Liza Miller And Kelsey Peters, Younger
While Liza Miller and Kelsey Peters have an almost Gilmore Girls-esque relationship — where Liza loves her both like a daughter and best friend — the story arc does have one problematic kink in their relationship: their friendship started on a lie. 

Liza is in her 40s but had to say she was in her 20s to get a job at the publishing company that Kelsey works at, which means that for a little over a year, Kelsey was non-stop lied to. Imagine if you randomly found out today that your best friend was actually 20 years older than you thought. You would be shook.