I think the point is (will be) that Grandma still wants to feel needed as part of the family celebration. If she can’t find something to do, she feels superfluous.
The groom is allowed to say only three things leading up to the ceremony: 1) You look great! 2)That’s exactly what I would have done! 3) I told you that b*tch was crazy!
How did the “bagged out” comment go completely unremarked by this group?