Hi Newlifestartsnow,
It’s hard to be against the “no good boyfriend” when he is living your dreams. You put so much identity into You, Future Doctor, that why WOULDN’T your little sister theoretically be attracted to a future doctor? And, yes, if it works out she would be a rich MRS. Doctor (insert his last name here). Being a Mrs. Doctor is a respectable title to have in itself and you may have to actually give her the respect she deserves. If this romance works out, she will no longer be just the inept college age girl who needs guidance from her older sister.
She may be too big for her britches. Who does she think she is, dating an older guy, not needing her sister, a flight risk who would move to other countries for love?
A potential future Mrs. Doctor, that’s who.
I say apply to med school and don’t think anything more about it.
Best,
Inky