I'm not at all an expert, but I'd suggest setting up Telegram. Anecdotally the Russian govt seems pretty dependent on it for their own communication. They've b

I'm not at all an expert, but I'd suggest setting up Telegram. Anecdotally the Russian govt seems pretty dependent on it for their own communication. They've backed down from banning it in the past, albeit in less serious situations. As long as you neither of you ever send anything political on telegram or join any political channels that might be your safest communication option.