I hope you have a wonderful day and get spoiled a lot! May this next year of your life bring many blessings.
Best birthday wishes to the best sister-in-law in the world! =D
And thank you for the sweet gift, too -- I'm looking forward to spending it!
But of course, I can't be the best sister-in-law in the world since you've already stolen that position! =) (I seem to think that I've clarified this before... ahem...)