Wallace by Catherine Lievens

You can’t make everyone happy, no matter how hard you try.

Wallace has only ever wanted one thing—to make his father proud. It’s the only reason he’s training to become a council assassin, but he’s not sure he’ll ever be able to go into that line of work. The problem is that his father won’t take no for an answer.

Hawthorne has known Wallace is his mate since the first day of training. He’s too old and grumpy for the young man, so he’s been hiding his scent from him while he tries to find a way out of it, even though he’s not sure he wants to lose Wallace.
When Wallace’s father decides to pull him out of the program, Hawthorne knows he has to do something, and not only for himself. He suggests that Wallace could stay with him for a few days.

And only later realizes that the spray he uses to hide his scent is empty.
Wallace can’t keep hiding forever, but after finding out Hawthorne is his mate, he wants to. But if he wants to be a worthy mate, he has to finally stop trying to make his father happy and focus on himself instead.

And on Hawthorne.