The Secret Thing by E. M. Denning

On the cusp of starting college, Christian Blackburn has had enough of his meddling, helicopter mother. He lucks into a room in a gorgeous house close to campus and away from the noise of dorm living. His landlord, Brandon, is a surprise. It doesn’t matter to Christian that Brandon is twice his age. He’s good looking, kind, a hell of a cook, and he doesn’t treat Christian any different because of his seizures.
If only Brandon wanted him back.
Brandon Hayes is comfortably divorced, but his life would be better if well-meaning people kept their nose out of his affairs. To ease his ex-wife’s concern that he’s living in a house far too big for just one person, he takes on a roommate. The much younger Christian is smart and charming. He’s older than his years, and his presence in Brandon’s life wakes something up inside he’s kept hidden from everyone. Having Christian around reminds Brandon of his attraction to men, a pull he can’t ignore.
One kiss changes everything.
Their chemistry is off the charts and their lives fit together in a way they never expect them to. Battling the age difference, a nosy parent, and the fear that people won’t accept them as a couple, they agree to keep their relationship secret. After a tumultuous weekend away, Christian decides that he wants Brandon by his side, and doesn’t care who knows about them. But what will happen once all Brandon’s secrets are out in the open?