If one party in a relationship expresses contempt, disdain, inpatients for the other, the Romantic (or Family) bond could break. Then you just have a business relationship. Even partnerships frequently dissolve over sniping.
Now, is the Romance brittle at its foundation, or is it possible one party is overly sensitive?
The question again. If the Romance is over, is the relationship over. The intensity of the Romance may ebb and flow but that romantic bond does not break if the relationship is solid and worth preserving.