My wife had 2 before me and one other than mine during marriage to me. The one during marriage was a bad fuck so she isn't open to any more. I did have a girlfriend that had over 80 different cocks (just for fun, not paid) and she was the best sex ever.
I have had hours of daydreaming about my wife finding a lover and getting pregnant by him. She is very conservative sexually and will not go for it even at my urging. I would love to drink her milk knowing another man enabled her breast to produce the milk. She is in her mid 30s while I am in my mid 60s.