Before death of my father;my father loved Rick as his own Son. My father helped Rick to get bank loan, so that he can start his own business; Rick miserably failed in that venture.
During the death of my father, I was very young so my mother remarried a guy, he was a relative and owed favors to my dad so eventually he married her so that the money could be protected and there would be a man in the house. This was so that the outsiders wouldn't take advantage of my mom
Because Rick was well-known and harmless, my mother chose him over everyone else when they were pressuring her to get married so she could have companionship and security. When asked about his marriage, all he did was nod. It appeared as though he was indifferent to it. He was deep in his own fantasy land. Rick and my mother eventually tied the knot. I left for the hostel to finish my coursework.
Rick was a poor guy, but gives all his money to pay my father debt from outsider. Mom wanted to marry a guy who is strong, fatherly figure, not interested in sex or family; basically she doesn't want to have sex or bear anyone child anymore) but need someone as protector. All these specifications match with Rick.
At age of 40,my mom married Rick 34 and started to lead a happy life. They are currently married for 4 years without sex or physical intimacy and also interacted very less. Introvert Rick speak less with your mom . Mom somehow developed a motherly love for Rick.