Instructions to mothers of the groom.
The reason why groomsmen all wear the same suit to a wedding--so if the groom doesn't show up, everyone can just take a step to the left. The people on that side of the church are just props, baby.
Your role, as mother of the groom, is to provide a groom. And maybe a brother for a spare. The extent of your input is limited to saying how lovely everything is.
The bride's strapless ballgown in the church? Why, it's lovely, of course. The mother of the bride's equally revealing gown to show off her boob job? Lovely. The new wife of the bride's father who describes herself as a "cougar" (in the latter part of her nine lives) (meow!)? Nope! Nope! She's so lovely. The "blending" ceremony in which all the members of the bridal party dance around and fill a vase with pink and blue vials of sand to symbolize the "blending" of two souls into one purple-ish vase of sand...or something? Lovely, lovely, lovely.
The mother of the groom simply floats along all this loveliness in a wildly elegant beige silk dress. The bourbon won't hurt, either.