Originally Posted by SenninKorby
Kakashi was 13 during the Third Great Ninja war, where Minato was highly likely in his twenties. Even if Minato were only twenty at that time, that would make Tsunade have to be 17 when she had him, and it only gets younger from there. At which age, she hadn't yet met Dan, as she is quite presumably over age 20 when she met him.
Also, Shikaku Nara is probably in his mid-Forties. Tsunade is 54. You do the math.
Naruto wiki says he is 41 and that makes a 13 year old age difference between him and Tsunade so if he and Minato are the same age then Minato isn't her son