I think its pretty weird of her to ask you that. But i wouldnt worry about hurting her feelings. if you add someone than your fi will feel like he has to add someone, you know these things end up mulitplying. i would stick to your guns and have the 2 you wanted. Just let her know your having a DW and really just wanted a small bridal party and maybe if you want invite her to help you get ready on your wedding day.