Off and On Again by Tia Fielding

Enforcer Ewan “Cal” Calder hasn’t shifted into his Scottish wildcat form in two years. He should’ve gone crazy by now, because that’s how these things are supposed to work. The governing body of all shifters, the Council, has sent him and his adopted teenage son Kit to a sanctuary in Finland. It’s a last-ditch effort to wean Cal off the morphine he’s been using to keep his cat at bay. If he doesn’t shift soon, there’s no way he’s going to retain his sanity.
Two years ago, Council security officer Derek Lamont was tentatively dating and getting to know Cal, but then he lost an eye in a tragic accident. While he was recuperating in the hospital, Cal and Kit vanished from the house they’d all shared. Derek has been searching for them ever since, traveling the world and grasping at straws because of the undeniable truth: Derek knows Cal is his mate, even though humans aren’t supposed to be able to feel the mate bond.
When Derek finds Cal and Kit at a small farm in the middle of nowhere, Finland, he feels relief. But their problems are far from over. From Cal’s guilt over the accident, to stray hunting dogs, to figuring out how to deal with the Council, things keep piling up.
If they want to be a family again, the unlikely mates need to find their way through the obstacle course that is life. With the support of the shifters at the sanctuary, they might just be able to pull through.