Just Wait by Missy Welsh

Nate is one day away from getting married to a gubernatorial candidate and he just wants to get it over with already. Which, yeah, isn’t exactly the most romantic notion. If he could pin his husband-to-be down maybe he could help Nate remember why he’d agreed to all this.
But then Nate’s ex shows up looking like he’s dying and claiming he will without Nate’s help. Reeve ran out on Nate a year ago, though, and Nate isn’t ready to forgive him.
Except now there are agents in tactical gear chasing them down and whisking them off to a nondescript bunker. And then one of them tells Nate everything Reeve said about his absence was true.
Which has to be wrong because people can’t shift into animals. Right?