Companion Ticket Question

Need some advice on best way to handle this.

I booked two tickets for my wife and I to attend a wedding this weekend using our companion ticket. It’s likely only one of us will be able to attend because of a sick dog at home.

Should I cancel the tickets? Does this forfeit my companion ticket for the year?

Should whoever doesn’t go just not show up?

Trying to figure out the best way to deal with this. Thanks in advance