Sara Jay is a highly recognizable name in the adult entertainment industry, active since the early 2000s. She is known for her curvaceous figure, specific aesthetic (often described as a "Milf" or "cougar" persona), and prolific career. For many men of a certain generation (Gen X and Millennials), Sara Jay represents a fantasy archetype: confident, experienced, unapologetic, and mature.
It sounds like you're referencing a phrase that combines a personal statement ("I have a wife, Sara Jay") with a term often used in adult content contexts ("extra quality"). i have a wife sara jay extra quality