Largest Age Gap- Older & Younger

As the title suggests, what is the largest age gap, older and younger, that you've had sex with.

ie: if you were 25 and hooked up with a 40yo the age gap is 15.

Oldest: She was 49 and I was 25. Met at a hotel bar where every Saturday they had a 4pc band. Sexy MILF, we danced, we drank, and we ended up back at her place where she wanted a young stud to pound her.
Youngest: She was 28 and I was 58. She was a very cute chubby BBW with big boobs, pretty eyes & lashes. I couldn't keep my eyes off her tits so I started flirting with her. Much to my surprise, she asked to go to my place 30 minutes later.

Older? 9 years (that's how much older my wife is)

Younger? Not sure. Some of the professional ladies I dallied with were probably 15-20 years younger than me.