Stand-in Wife (Those Manning Men #2)
Debbie Macomber

Tragedy had shattered Paul Manning’s whole world, leaving him a grieving widower with three small children. Reeling from shock and grief, Paul turns in desperation to the one person he knows he can count on: gentle, caring Leah Baker. Slowly, Leah eases his sorrow and fills his life with new meaning. Then Paul makes an amazing discovery: he needs Leah, and he wants more than a stand-in wife.
Originally published in 1992