Any tips? Is it weird that I want her to do that?
You can't "get" her to do anything she doesn't want. Try just telling her you enjoy it when she shows off encourage her when she does and suggest a few things you'd like to see her in.
You need to start with what she wears when you go to the beach. See if she will wear a thong bikini first,if she will do that, then see if she will wear dresses that she can wear bra less. Tell her it is one of your fantasies, she may like it. I don't think it is unusual to want to show her off, on vacation no one knows you.
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