Santa’s Sunshine Omega Boy by Anna Wineheart

Kris was never supposed to return to the same house—or the same boy—over and over again.
The Santas of Alpha Ridge have one job: To create and deliver presents to children all over the world. Living conditions at the North Pole are harsh; it’s no place for an omega, much less a family. Hell, Kris doesn’t want an omega.
Until a fateful night flings him into the lap of a sunshine boy in desperate need.
Frankie is startlingly cheerful, the exact opposite of Kris’s surly grumpiness. He bakes Kris cakes and makes him promise to crack a smile; he gives Kris doe eyes and asks for help.
Kris finds himself making up ridiculous excuses to return. Anything so he can care for Frankie and see him smile again. He’s not flirting, he’s not falling in love.
Until Frankie’s heat catches them both off-guard, and suddenly things are a lot more complicated…