After a few unsatisfying medium-long term relationships, they settle down and get married in their mid to late 20s. They end up with a middle class salary at an average job. They will have two children, one of whom will be average, and the other of whom will have mild autism or a learning disability.
After the children are born they both will struggle with their weight, but they’ll never actually get “fat”.
After the kids are old enough to go to school, the wife will return to work.
As time goes on, they’ll occasionally daydream about how things might have been different if they’d been better looking, or married a different person, or tried to do something remarkable with their life. Then they’ll sigh and wonder about what they’re going to make for dinner, or whether their polyester-cotton blend shirt feels tighter this month than last.
They’ll retire in their late sixties in the midst of slowly deteriorating health. They’ll die several years later, mourned by a few family and friends and remembered for a generation or so, until their grandkids grow old and fail to pass on stories about them to their own grandkids.