Woohoo! Your sister-in-law's birthday is just around the corner and since both of you are basically best friend now, it is time to plan a huge celebration for her. Top it off with this sweet ecard too.
Birthday celebration with your bestie is always great. It is greater when that bestie is your own sister-in-law. Plan a great day our for her and take this ecard as an invite to tease her of what's happening on that day.