Sleeping in the dog house...again.

My mother & sister are arriving tomorrow from Brazil to finally meet the baby. The only time my mother came to visit me was when I got married. It took 12 years leaving abroad for her to come. Now it is because of the baby.
She is the one who gave me the money for the down payment of our house. Needless to say that we want to show her it was a good investment and so I’ve spent most of my time during the past weeks fixing up the yard/house. I hope she likes it...
She will also spend her birthday with us.
So I was talking to my wife about present ideas we should give her.
After thinking of a few gifts Ideas, my wife then asks me what should we give to HER mom, since she will be leaving next week (after 4 months with us).
Jokingly, I said I had my heavy winter boots I could put and then give her a hearty kick in her butt out of my house..... Well....needless to say that my wife didn't really like the joke. Oh well...