What might be some factors to inquire about with members of a couple that could represent barriers to separation or divorce?

As you just learned, the Marital Status Inventory (MSI) asks several questions related to steps a couple may have taken toward ending their relationship. However, this measure does not assess barriers to ending a relationship. Such factors would be important to know about. What might be some factors to inquire about with members of a couple that could represent barriers to separation or divorce?