fall into lap
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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.
fall into one's lap
Fig. [for something of great value or usefulness] to be given or granted to someone without having been requested. Some valuable antique jewelry just fell into his lap. His late mother had kept it hidden for years.