First time poster here so, please be gentle! I have circa 600K personal Avios and 1M in our HHA. It's time to spend some of this and I want to treat my SO without them knowing. Even though 600K Avios is sufficient, I believe the way HHA accounts work, is to debit both/all members' accounts in the proportion of the total pot. My question is, can a booking be made for myself and SO with Avios only debited from my account and, in so doing, keep the booking secret? At least until a few days before, perhaps!!