What is the duration that the semen's emission is delayed for a woman after a wet dream, and is it known or not, and what are the implications for the prayers that were performed without knowing about it, and is there any evidence from the Qur'an and Sunnah for the delayed emission of semen?

The delayed emission of semen after intercourse or a wet dream is a palpable matter. Ghusl (ritual bath) becomes obligatory upon its emission after waking up. If semen is discharged after waking up, Ghusl is obligatory. Whatever prayers were performed before its discharge are valid and sufficient. Ghusl is not obligatory unless the emission of semen is certain.