This is the most quaint language I've seen in this strip in awhile, which is saying something. When did Margo become so demure, anyway? Kick his behind? Is that code for something unspeakably violent? Gosh, first you kick his behind, next thing you know his slippers and cocktail won't be waiting for him when he gets home.
You know what a hormonal Nina probably wouldn't like? Coming home to find her husband decorating the nursery and spilling all of their marital problems to another woman. I'd kick his behind, too.