To understand the joke, you must first understand the subject. (born in 1987) is a highly successful former American adult film actress and model. Active from the mid-2000s to the late 2010s, she became renowned for her “girl next door” aesthetic, petite frame, and a prolific career that earned her multiple AVN Awards.
This is a classic compartmentalization strategy. The brain separates “wife” (safety, love, domesticity) from “Lexi Belle” (novelty, taboo, raw stimulation).
I blinked at the screen, then looked beside me. Her side of the bed was empty, the sheets cool. She hadn't been there for hours.
: This is often used in online comments either as a literal statement of marital status or, more commonly in these contexts, as a "troll" or "spam" comment intended to be provocative or nonsensical.