It's expected that you buy family members a wedding gift.
Jenna was invited to her sister's wedding at their local Catholic church.
Jenna wants to avoid spending too much money.
Jenna gifts her sister the antique necklace Jenna inherited from their grandmother.
Jenna comes to the wedding and enjoys the open bar, but doesn't bring a wedding gift.
Jenna's sister is touched by the highly personal present and hugs Jenna.
Jenna's sister tells her mother to bring it up every time she sees Jenna for the next year.