Tim McGraw was incited by the woman he slapped ... because we've obtained new video showing she repeatedly smacked him on the ass before he reached his breaking point.
TMZ broke the story ... Tim bitch slapped a fan at an Atlanta concert earlier this month ... after she got handsy and tore his already-ripped jeans. Tim's problem -- he had shooed her hand away, and even hesitated before walloping her. She's hired a lawyer and apparently wants money ... or else.
But the new video shows Jesslyn Taylor aggressively whacked Tim's ass 5 times before the slapping incident.
We reached out to Jesslyn's attorney ... so far no word back.
Reps for Tim had no comment.