Some couples will give their "I love you" rose buds to the mothers as they walk out. For example, the groom would give his rose bud to his new mother-in-law and the bride would give her rose to her new mother-in-law and say something like, "I'm happy to be a part of the family, etc." It works best if the giving of the rose buds to the mothers is a surprise. It also works for dads!
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Redefining the wedding ceremony by rethinking traditions.