I'm not sure it ever passes. It gets less. You get more secure. But I went three nights last week unable to sleep well. It was more complex than just jealousy, but there was definitely some jealousy involved.
Me: 40 straight male in a V with
Wife: Kay - mono female - married 18 years
LDR girlfriend: Susan - poly female - 3 year relationship
Stakes - very intimate friend
Ironically named Farmgirl - local interest