Delia and teen Lydia had a passive-aggressive feud throughout the original movie, with Catherine O’Hara’s character finally getting payback for that teenage angst in Beetlejuice 2. When the Deetz family members are first introduced in Tim Burton’s 1988 Beetlejuice movie, it’s clear that their dynamic isn’t without problems. Teenager Lydia (Winona Ryder) was “miserable” with life in New York City and embraced her dark, gothic aesthetic while being a self-professed “strange and unusual” person. This demeanor didn’t jibe with her stepmother Delia (O’Hara), a vibrant New York artist who sought the approval of wealthy, influential figures in the city.

https://screenrant.com/beetlejuice-2-delia-lydia-payback-betelgeuse-truth-hidden-explainer/