You should admire them and let her know how beautiful she looks but TEASE her by going back to kissing her belly, shoulders, arms, and everywhere BUT her chests.
Bridal attendants are chosen from your close friends and family members, including any sisters of your groom. However, alternatives here . http://www.crebig.com/board/bbs/board.php?bo_table=free&wr_id=1353304