What works for some couples might not end up being a fit for others, which is why people need to collectively figure out the rules and boundaries of their relationship. Unfortunately, in some cases, even partners who have been together for a long time might be on completely different pages, which can cause problems.
This is what happened to one woman when her husband of fifteen years suddenly demanded a polyamorous relationship and had someone lined up to date him. She still tried to make it work, but ended up feeling broken.
More info: Reddit
