I had mentioned in passing to my future mother-in-law a year ago (when I had just gotten engaged) that I might have my fiance's sister be one of my bridesmaids. Maybe it was a mistake, but I had told her that I had no concrete plans and that I was just considering it. Well, my mother-in-law told my sister-in-law that I was going to ask her to be a bridesmaid and she got all excited. She also told me that she would do my hair (at the time I had not even considered who would do my hair). Recently, however, I was talking with her and she told me that she doesn't want to be in the bridal party because she hates dressing up and being in that type of role (the primary source of my initial hesitation to include her).
She does hair for a living and has done mine several times. I think she does a good job but I only ask her to do basic stuff. I actually have a hair dresser that my entire family has been going to since I was in elementary and who I had expressed at some point that I would like her to do my hair. However, my sister-in-law thinks that she is going to do my hair. The hairstyle I have chosen is not incredibly complicated and I'm sure my sister-in-law could do it, but I think that my regular stylist could do a better job and I would feel better about it. My sisiter-in-law kind of has a "oh, whatever..." kind of attitude and my stylist is a lot more professional. However, I am conflicted because of the whole bridesmaid situation and the fact that I want to include her in my wedding somehow, just not in those ways.
Should I just let her do my hair? My mom suggested that our regular stylist do my family's hair and let my sister-in-law do mine. What is the most appropriate option here?