Lol this is fukked up. He is emotionally checked out, and from the subtle faces he's making while shes talking you can tell he is one or two arguments away from leaving ol girl. If she is complaining like this on camera, IMAGINE what she says to him when no one is watching. Not saying she is right or wrong or vice versa, but passive aggressively begging for affection from a spouse is a major sign the marriage is about over.
I dont look at this like shes being immature. I dont think she is literally wanting the single life while married. What she is saying is she misses the passion, chemistry and affection. Most married women (and some men) do. I've met older married like her, and usually what tends to happen at this stage is either 1) she cheats and finds someone who provides that need or 2) her husband divorces her. Not sure which one will happen, or if both will happen, but their situation is RIPE for cheating.