What do you buy a sister-in-law for X-mas?

A key to the hotel room you've booked.

Big bang tee it is! Thanks guys LOL

Just don't buy a size too big....

She taught my son that soft kitty song Sheldon sings, she's getting that Tee shirt LOL

Lingerie, if she's hot. Then that hotel key Gunny was talkin' bout.

Get her a nice looking wrapped box with a decent sized hole on the bottom. You'll figure out the rest.

Make sure you tell me how it goes.

A friend of mine did that, he used a bag of peanut M&M's instead of the box.