Last night I emailed our pastor with what I thought were the last of our ceremony details, including who would be ushering our mothers into the ceremony. He replied to ask me who would be ushering FI's dad and step mother. This kind of caught me off guard, as I somehow just assumed they would walk in together.
Is it proper to have an usher escort FSMIL with FFIL walking behind? Is someone supposed to escort him as well? Is it wrong for the two of them to just come in together?