sounds like you both need to let go of some dreams.
whats your frequency? Do you have a schedule?
If being an incredible lover was the foundational part of the R then why aren't they still together?
its not the foundation. Being a family is the foundation. Mutual interests. Shared goals. Compatible beliefs. Family fights, loves, shouts, hugs, but you accept your family for who they are at the end of the day even when they really PISS you off.
Without these things sex is just sex. It can be fun, physically satisfying, but without the rest its just a body function.
When you add sex to all the previous things, it becomes a cement that makes two people stick like glue.