1. watch the mini-bike episode.

2. find the part where each of the boys are telling Lois what they will do if she lets them have the mini-bike.

3. Find the part where Malcolm is talking to Lois while she is in the shower.

4. When she opens the shower curtain, look to the left to lowest part of her left side that you can see, if you watch closely you'll see the edge of a towel that she's got wrapped around her.