Reported earnings to HMRC, just making sure you are declaring the correct amounts and paying correct tax. As your gifts received are pure manipulation by battling your sister where both of you are in the same car park in different cars doing toxic battles which are planned out with both of you in on it calling out gifters on the opposite side to get gifters to send money/gifts through manipulation and anger. HMRC have been informed so don't try and avoid taxes either you can't manipulate yourself out of that like you do gifters.