Michaels,
This happens periodically with this couple. Once a month or so they get into a shouting match and he leaves, calles her so they can yell at each other over the phone, then returns and they yell some more and eventually they make up and fuck.
This a couple that is not good for each other. She introduced the dog so she can have someone who can give her unconditional love. Paul, while appearing to be intelligent, doesn't care enough to get on the internet and learn how to please his woman. And she is dumb enough to not tell him. Christ she is in the medical field and still cannot tell him how to please her so she fakes her orgasms.
I vote for them breaking and up getting off RLC.