No, probably not
The live party members are probably not really widowed, and are probably still married. A key component of being widowed is being left alone, unmarried. A marriage is annulled upon death, since the union ceases to exist. A group marriage is not, since members of the group are still alive. (As pointed out by @Kirt, the concept of multi-generational "lineage-marriages" has been proposed in Sci-Fi novels.)
Being revivified probably restores the marriage. In DND, if you are resurrected you are no longer dead. Especially if it happens quickly, legally it would probably be treated as only being "downed" for a bit. You couldn't get out of a bad contract because you "were technically dead for 10 minutes". Therefore, you are probably also no longer unmarried, and your partners are no longer widowed. In the same vein, you would probably want your gear back, even though you legally would have lost ownership of it, being dead and all.
These points are all up for debate, though, so ask your DM.