If you get a chance during the night then could ask , but weddings always do full on busy and short time frame may not get a chance. If resistance I would drop it and not push issue.
Could you give it to her a day or so before wedding?? Or after wedding???

We didn't open presents until the next day after we went back to reception centre to pick them all up and take back to where we were staying! Very strange to hear bridal party opening.