It all depends on what's most important to YOU. If attending this birth is more important to you and your family then that is where you should be. however, if you're going to kick yourself continually for not going through rush and you feel that your happiness will be effected by it, then you should consider staying. What will make you the most happy? what will effect you on a larger scale for a greater amount of time? will you have any unsettlable regrets regarding either choice? do what will make you feel the best about yourself. I have to reiterate that you really only get one chance at LSU, but I don't have an opinion either way as to what your choice should be. I will say that the day of your sister's C-section she will probably be way to cracked out on medication, exahaustion, and pain to be all that conscious of who is around her. It's your choice though, and I hope it all works out for the best.