

There is a South Indian film that takes on this idea.
Two nearly century year grandparents have fallen into a routine of elderly living, taking care of each other with some help from the kids.
One day the grandfather finds a love letter from another man addressed to his wife from over 50 years ago. He is livid and wants a divorce despite their near 75 year relationship.
The family largely tries to dissuade him but he is determined to pursue divorce. His wife largely remains silent throughout all of this.
Ultimately a daughter who the grandfather has estranged for going on her own path returns and the context of the grandmother’s affair is revealed.
The grandfather was a flawed character with an inflexible patriarchal view on family dynamics (a fairly global norm in the 1950s and 60s). He has shown growth into a more egalitarian mindset since then.
However, when they prematurely lose their eldest son to a drowning accident, he struggles to cope. He turns to alcohol and while being lost in the bottle his wife (the grandmother, who is also mourning) has to find a way to keep the family together, raise the kids, manage the household entirely on her own.
It was during this period that the affair occurs. A man in the community offers the grandma emotional support while the grandfather is trying to drink his grief away, detached entirely from his family in any meaningful way.
When the grandfather comes to know that it occurred during a period of life that he has come to regret, he forgives her, as she forgives him for his detachment while grieving the loss of their son. Having reconciled they die peacefully together in their sleep.
I completely agree with you that obsessive monogamy is toxic. I think if someone is cheating “casually” in a mutually agreed upon monogamous relationship then that is a red line and disrespectful. However, real life can get pretty complicated and no one should be entering a relationship expecting to exert absolute control over their partners body / intimacy. That is incredibly toxic





The answer to your question is a resounding no but you both need to be on the same page. Is there any real risk of you developing deeper feelings that will hurt you in the future if/when you’re cast aside? Are you ready to be cast aside on terms that are not your own if his parents decided it’s time for him to get serious? Would you be comfortable with going from his priority to a distraction in one fell swoop when things get real? Would you simply end the relationship at that point?
If you feel respected by him and his family and you’re cool with it not going any further / potentially ending abruptly then sounds like you’re okay with the circumstances.
You’re in a relationship with a guaranteed expiry date. Traditionally relationships were a means to an end (marriage), now they can be much more sophisticated. Are you truly satisfied with terms of your relationship and most likely outcomes?
If there were a person who treats you great, fucks you good and gets you but also could be a long term partner, would you rather be in that situation? Do you think you’re wasting time by not looking for that person? Is not the oppurtunity cost of this relationship too high if that’s the case? Is there a part of you that feels your investment in this relationship is a sunk cost that makes it difficult to look for alternatives?
It really comes down to whether you want a long term relationship or not. If that’s not a priority to you then you’re fine. If it is, then you may be passing on something even better and you need to decide if it’s time to go look for that.