It's possible Marten would hit on Claire, but Claire might not want to take advantage of his inebriated state, unless she was drunk too. But we don't know Claire that much to know that for sure.
She seems to have her head attached firmly to her shoulders.
She might have... issues...though. It's unlikely she treats sex with a healthy degree of casualness. If unusual anatomy is a thing of the past, maybe. It may not be, and
no it's not polite to ask, or to speculate. Even here. Even of a comic strip character.
Intersex people face the same kind of issues. Many are fine having unusual anatomy there, but we realise others may not be so blase.
As a member of the Uni's ALLY program, I've had to help Intersex students as best I can. It gets complicated in those situations because they often don't know they're Intersex until their late teens. When a gal of 18 gets told the reason she hasn't started her periods yet is not because she's a "late bloomer", but she has CAIS and XY chromosomes, or Swyer syndrome, or some such, it can be a real shock. If some (long string of sulpherous and unladylike expletives capable of stripping paint at 20 metres) "doctor" tells her she's "genetically male" then I'm really, seriously tempted to commit homicide. With refinements. There's no such thing - one in 300 men aren't XY, some women are. Even those who have given birth. Such (long string of scatalogical and malefic expletives again) crass insensitivity can be psychologically devastating for those unprepared for it.
Anyway, I have to help such young women decide what to tell their boyfriends. Or girlfriends.