Been stuck here inside China since Jan 2020 (though some hope that the covid dynamic-zero flood gates will open soon-ish ...) and will soon need to extend the 50000+ Avios in my wife's account.

Am I correct in thinking that gifting Avios to her will do the trick and that this transfer is free (as a Gold BAEC member)? To be clear, I mean as activity in her account, not mine (I already extended my Avios a couple of months back through a domestic hotel stay).