i was searchig for more beautiful dresses for your little nieces and got some wonderfull dresses for them at wallao.com it look awesome and give you some idea to choose the right one..
I think teal color would be perfect for your mother as it will give complex of two colors...and in this color a formal suit will be fine with a suitable mufler..
wonderful combinations of flowers......it shows combination of creativity and knowlede of making varity........I like the concept of same color of flowers with the brides dress........wonderful work.......
It's better for now to shop with your family members, as your family member know your likes and dislikes so they will better advice to selesct a perfect dress for you which your future MIL can not give for now...........