Yan Zhizhai 15 years old. When Yan zhizai gave birth to Confucius, he went to Niqiu Mountain to pray for blessings, and later he gave birth to Confucius, hence the name Qiu. When Confucius was 3 years old, Shu died. Confucius 17 years old, his mother died at the age of 32.
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Although Confucius was born out of wedlock, it did not hinder the greatness of Confucius. According to the ancient etiquette of China, the appropriate age for getting married and having children should be 16 to 64 years for men and 14 to 49 years for women.
Anything beyond this range is impolite. Confucius' father Shu was 66 years old when he married Yan Zhizhai, so he called it sexual intercourse. Others say that Yan Zhizai belongs to the untouchable class.
Shu is a scholar-bureaucrat, so he is called Ye. It is also pointed out that Sima Qian only said that Shu and he had intercourse in the wild, so it was called promiscuity.
Baidu encyclopedia-Yan zhizai