MOH not walking down the aisle...?

My sister, who is also my MOH, broke her leg 2 weeks ago. She is getting her cast taken off THE DAY BEFORE her flight but will have to wear a boot until she gets back home and checked out by her doctor. Even though the cast is coming off, she needs to keep off her foot so she'll have crutches. My question is, would it be weird to have her standing at the alter as the rest of the bridal party walks down the aisle? Or should I have her walk down with the best man,? That way she can support herself on him instead of walking down with crutches