fall into someone's lap
fall into (one's) lap
To be received unexpectedly or without effort. I didn't steal the internship from you—it fell into my lap, I swear! Your aunt has decided to get a new car, so her old one might fall into your lap.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
fall (or drop) into someone's lap(of something pleasant or desirable) come someone's way without any effort having been made.
Farlex Partner Idioms Dictionary © Farlex 2017