The Beloved Impostor(1918)

Dick Mentor's wife is killed in an auto accident while deserting her husband for another man. Soon after, their child dies, which leaves Dick a confirmed woman hater. Betty, an attractive flirt, learns that Dick is coming to visit and bets Hugh, an admirer, a kiss against a horse that she can win the misogynist's love. By masquerading as a charming twelve-year-old, Betty captivates Dick, but in the process, falls in love with him and is afraid to admit the hoax.