What will happen if i change my ex-gf apple ID password?

Found out girlfriend is cheating on me (long distance relationship)

I bought her an iPhone5 and set it up so I just changed the apple ID password. What will happen to her phone then? Will she not be able to instal apps etc?

[I know i can wipe it, but leaving that as last resort]

Change the bloody password now! Now! Cheating is low in any form!
CHANGE IT NOW! JUST DO IT!

Like you said, she will not be able to download any apps or music or anything. If it is her email using the account, she will probably be able to change the password, if she knows the security question answers they may ask (I believe apple products use those. It's been a long time since I set up an apple account). Hope that helps. Sorry to hear about your girlfriend. Keep your head up!

Wount be able to install apps