Original Commentary

Ah, nightgowns. The old Christmas standby. Can't go wrong with a nice flannel nightgown. And yes, the fact that Kimberly had Brisbane deliver the present to her mother is pretty standard for the Taylor family - Terrence

Modern Commentary
Ms. Taylor's reasons are "It gets cold at night here" and "If I'm in the tropics, I won't have to wear this".

Not that she was going to wear it either way - Terrence