I always give benefit of doubt but....
Does he not have any type of access to the house his future wife lives in? More importantly, is the house actually in her name?
Maybe this isn't the full encounter, but he doesn't have a key?
This was captured on a Ring camera. Does he not have access to the camera?
If has access, did his girl forget he potentially could see men coming and going?
I assume he's on the road. However, he didn't live with his soon to be wife?
Is the reason he really came home is because he saw a stranger in his wife.
So many questions...