HII LOVED YOUR BOOK!
MY SUGGESTION:
PANSY X BLAISE X READER X DRACO
You and Draco and sneaked off during a party to the library do IT and find Pansy and blaise doing it. So you decide to do a 4some were you switch, ie: Pansy X blaise then Pansy X Draco then Pansy X reader, reader X Draco then reader X blaise then reader X Pansy? WITH SMUT AND DETAILS PLEASE!