Let her come with you, if that's what you think you want. Medical School? No problem. Take her round the wards? Why not. You might even graduate. Then she could shadow you while you're a foundation doctor, maybe help out with a few tips if yr having trouble with a diagnosis or two . . .
Although, you do realise, at some point, you will have to make a few decisions for yourself. So long as that's ok?
(Or, in other words, DON'T DO IT!)