Activity of Markie

My niece is 8 years old and she asked me to be a flower girl. My fiance and I dont want one. We know this will offend my sister- but we think shes too old. Is there something I can do to include her? (Im opposed to Junior bridesmaids too)

My fiance is really turned off by the "cheesy & fake" (not trying to offend anyone!!) regular photos of couples laughing in a park. I convinced him to do them and said we could do something different. Any ideas?!