drop into (one's) lap
To be given to one or become available to one through sheer chance, rather than hard work, etc. Because she's the daughter of a CEO, I'm sure great opportunities just drop into her 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.