In the play, this line is a pivotal part of Baroka’s (the "Lion") cunning plan to win over Sidi, the village belle. Baroka spreads a false rumour that he has become impotent. He does this to lure Sidi into a false sense of security, making her believe he is no longer a "threat" to her chastity.

When Sadiku says, "I was there when it happened to your father," she is referring to the loss of virility/potency. Sadiku was Baroka's father's last wife and was inherited by Baroka when he became king. So, she was present during his father's old age and had knowledge of his impotency

Sidi, believing Baroka is harmless, visits him to mock him, only to be seduced by his wisdom and strength. This eventually leads her to marry him instead of the schoolteacher, Lakunle.