In His Secret Life

When Allan's boyfriend leaves him for a younger man, Allan lets him go without a grudge. When his sister, Elsie, gets pregnant and ditched, he becomes her support system and father figure to his niece.
Then Elsie becomes engaged to Dayton, and Allan meets Dayton's older brother, Davinder—a fierce and exceptionally gifted artist with a thousand secrets breathing in his eyes. But Davinder is a married man and father of two young boys.
From the moment they meet, and for over four decades, Allan and Davinder will walk along the edge of their secret lives, never allowed to push open the gates. And though their love is a head-on collision, a meeting of the minds, a fusing of two lost souls, both men know that it is also, and above all...impossible.

Rated '3/5 - Open door' for steam/spice/heat level.