15 before me... At least
Your wife has been cuckolding you for a little more than ten years, and has been going sexually "steady" with her current boyfriend for about two years. So having her head over to her boyfriend's place for sex on short notice is a common occurrence, and both you and she consider it just a normal part of your married relationship.
Experienced: Thx for being so understanding and generous!
There are men who really enjoy fucking married women. My wife dated one of these types of men for a while.