Wait and see what happens

You move your hand away from her and lay down, hoping she'll decide to show a bit more off later.

'I'm going to do my back first' She says to you, and turns over onto her front and lays down. She still has her straps down and you hope her boobs may fall out of her top later on. You figure you'll have to wait a while to see any more flesh.

Just then she raises herself up an inch or two from her towel and quickly pulls her swimsuit down to her waist before lowering herself back down. It all happens in a split second, but for a moment her bare breasts were visible to all. She opens her eyes for a moment and smirks at you. 'You're so rude', she says.

You glance over at the guy near you who then looks away quickly. You realise he must have seen her tits, and it gives you a major turn on.

You could tell Kate, who may like this and give the guy more to look at? Or do you see if she does anything later?