You don’t just leave Vladimir Putin. I guarantee you this was his idea else she’d already be dead.
I wonder why he stayed married to her for so long.
It seems to me he knew she would keep his comings and goings a secret and knew he could rely on her.
Though they do have this strange tradition in Russia of letting the deposed live to a ripe-old age, so long as they go off somewhere by themselves and do not cause any trouble for the regime.