What's Stanley's marital status?

He was definitely married at some point, and I think I remember seeing his wife at the roast in "Stress Relief" (also, Michael made a joke about Stanley crushing his wife during sex in the same episode). But in "Blood Drive," Stanley attends the lonely hearts convention/mixer Michael puts together. Was he just there because his wife doesn't work in the office park, 또는 did something happen between him and his wife?