Continuity mistake: In the first scene where you see Mooney getting a bath she is wearing a necklace with pink flowers on it. A few scenes later you see Halley buy her that necklace, after they sell the magic bracelets.
Continuity mistake: When the woman is sunbathing topless, the sun goes from being overhead in the far shots to in front of her in the closer shots. See also the difference in exposure.
Answer: Because Scooty was nervous and didn't want to see it. If he wasn't the one that did it, he more than likely would have been curious and watched it with his mom.