You may want to have different booking choices to offer a sibling discount.
This article will teach you...
How to create a club that offers sibling discounts
First, follow the regular set-up guidance
To offer sibling discounts when making booking choices, add a typical price and another option for sibling discounts.
Continue the setup as per the guidance articles above
What if a payer books the wrong option?
Great question, just amend the booking following this guidance and the payer will see the new charge.