I would be quick to card on that.

I gave an indirect last week when a goalkeeper was wasting time just holding the ball with less than 2 minutes to go. I counted really slowly to 8 (I know it is only 6 seconds) and called it.

This was out in the far corner of the box. Then the keeper was dumb on the indirect and tried to stop it as it was going in the goal and it went off her hands. Tied the game up with 30 seconds left. Karma for time wasting. If she would have just let it go it, would have been a goal kick.