"victoria and patrick have been married for ten years. victoria recently got married to joshua while still being married to patrick. she has romantic relationships with both her husbands. this is an example of "

This is an example of polyandry.
Polyandry happens when a woman has more than one husband; the opposite, when a man has more than one wife, is called polygyny. Although polygamy is generally illegal all over the world, there are still some countries that practice it - polyandry is a common thing in Nepal and parts of China.