why would clementine do that after getting married?

It's not made clear, we can only speculate on the motivation.

She did it either for the money (for herself or for John) or because she's a pathological personality.

I seem to recall some dialog in the motel scene where John said "they met a man in a bar" -- perhaps the $300 was just too much to pass up, especially when they had just been married.

This is how I took Clementine's actions. She'd been on her own, doing what she needed to do so long, that being married 1/2 an hour wasn't going to change old habits.

Plus, how much did she really know, John? Maybe she figured she could get a few bucks in case things went sideways with her new husband and she was back supporting herself again.


>O Stands For Osom (awesome) ~ New York<

I think it's pretty obvious she just didn't really love John.

Recall:

Sydney and Clementine are in a cafe and clementine makes a comment, something along the lines of:

"I don't do anything I don't want to."

Maybe I interpreted this wrong but if you ask me she seems like she has no shame in prostituting and in all eventualities has somewhat of a taste for it.

I don't know if it was because of the money, because the money was nothing to get hasty over, but it seems to me that she has a sort of strangeness when it comes to sex perhaps? She's a waitress who has to deal with every little pervert who comes around and stares at her in her tiny outfit and makes little suggestions, maybe things like that just grow on her and become a sort of addiction or rush (I mean, when she asks Sydney if he wants to *beep* her, I kind of get where she's coming from, but it still has a certain "where did that come from?" to it)...

I think it could be something like that to her, because even if you are married you can always still have an addiction just scratching at your shoulder and sometimes you fall for it. But this is just my opinion and I have no clue if it could be true, however I do think she loved John, a lot of things in the movie pointed to them imo. lol, that was long!

it's just who she was, what she knew.
i heard a pimp say in a documentary, "i don't make no hoes. bitch was hoeing when i met her, or she was going to."

I don't recall any discussion between Clementine and John about changing their life styles just because they got married. Besides, both were drunk for that marriage and not much was really changed by it in Clementine's mind. Do you really think she could count on John supporting them? And her looks at him at the end really suggested she just married him as if it was merely something to do, to try, not much real emotion attached.