I looked this up. Raichik's tweet links to a blog post. The first paragraph ends with "And kids were reportedly present."

Further down, there are pictures of the event with the caption:

> Feel free to take a look at other photos from the drag show fundraiser, where at least one child is pictured.

Based on this, I don't think it's a slam-dunk case of her lying. It's possible that a child was present at some point but not for the spanking.