Vex is a corrupted Allay

Evoker invoke vex, since it is so similar to the allay, and pillagers beeing renegade villagers, i thought it would be a good add to the game story if the vex comes from a corrupted allay, and allays beeing originally a "village pet". It could have the same machanics too, like if you give a sword to a allay, instead of picking more of that, it could use it, like a vex, becoming a such a great ally to the player.