Some versions have

Yim Wing Chun's father as a Shaolin-trained practitioner, and say he taught the art to her and Leung Bok Cho.
Rather than the unnamed gangster being the catalyst for Ng Mui teaching Yim Wing Chun combat arts, some say that Yim Wing Chun made a living as a professional fighter, wagering her hand in marriage (she was a woman of uncommon beauty) against an adversary's money. Leung Bok Cho was smitten by her, and took up the challenge.
Some say he was beaten, but that Wing Chun was as smitten by him as he by her, and she married him anyway. It is said also that the fight took place on a small raised platform, providing the more compact and direct art of Wing Chun with an advantage over the Northern Chinese styles which used wider stances and larger, more acrobatic movements. Leung Bok Cho was said to be a master of a Northern style.