Credit Card Troubles

We use our credit cards for almost all of our purchases. Each month we are able to pay it off, but this month was different. Our bill was crazy high. Here is a recent conversation about it between Derek and me.

Derek: Have you looked at this last credit card bill?

Lena: No, why?

Derek: It's really high this month. It looks like there were a lot of online purchases. Have you been shopping online?

Lena: No

Derek: You sure?

Lena: Of course. I haven't bought anything. Have you?

Derek: Nope.

Lena: What were the purchases?

Derek: There are several purchases from Baby Gap and Toys R Us and a membership to Gymboree classes.

Lena: Nope, I haven't purchased anything from there this month.

Derek: Well, that's strange. I wonder what happened...