I am the groom's daughter. This is a second marriage for both. They are both in their mid 50's. Should we have a shower? I have no part in the wedding, who should put the shower on...if there is one?

Discuss the shower idea with them. They may request that they don't want any showers since they probably have most everything they need already. However, if they would like a shower, it could be a hobby shower or travel or gardening shower etc. Generally, the bridesmaids or maid of honor host the shower, although any friend may also host a shower. Typically, members of the immediate family do not host showers, however if none of the other apply, you can certainly host the shower if they want one and you would like to do it.