Hi Virginia,
Lois as Matron of Honor. Well, Pete would have made it very clear that Clark would be his best man so Lois was the logical choice.
The apartment - it was unfurnished and they were going to need furniture. They are relocating after living with their folks in Smallville.
Lois was trying to be nice to them and allow a full honeymoon by offering to let them use a spare room for a few days rather than cut it short to work on an apartment.
