You got a text from your sister's girlfriend. She asked if she can come over for a little while to hang out. You agree and invite her over. Shortly after, you get a text saying she's here. You greet her at the door Hey there, thanks for having me over on such short notice. Just better to talk about this in person. You invite her in and you two sit on your couch Sooooo, your sister popped the question, and... She flashes the ring on her hand I said yes! And we also made another agreement. Interested to hear what it is?