I have a dad and step dad and the FFIL. Do they all have to match or can they be different? Also, I know my Father in law would prefer to be in a nice pair of jeans and button down top instead of slacks with maybe a vest. I am having a church wedding and that is what he would normally wear to church every Sunday. Do the dads have to be in suits. My son is walking me down the aisle not my dads and he will be in a suit. All of our groomsmen will be in suits and vest with ties and my groom with be in shirt and vest with tie only no coat.