Your W is on a journey of exploration. I really doubt how they can sustain their A for the long term when on two different continents. No worries. Although I must warn you that she may go all monster on you when she returns from the trip.
MLCers spend money like water when it comes to OW/OM. I'd suggest that you get your own banking account to protect your assets. There have been too many stories here when the MLCer has raided all of the accounts and credit cards thus depleting funds. Not a pretty picture.
When W prepares to leave, just calmly ask her for emergency numbers in the event of an emergency. She will most likely refuse and bite your head off. Just calmly say "okay, I'm sad to hear this." Then walk away.