found a    yellow colour in the underwear
Question

A woman had intercourse at night and she had a ghusl and in the morning there wasn't any traces of any discharge; yet at noon found a yellow colour in the underwear; she was not sleeping and there wasn't any shahwa at all.Is this mena and does she have to repeat to have another ghusl and repeat the prayers
Praise be to Allah.So long as there is no intercourse or emission of semen, whether awake or asleep, following ghusl (complete ablution), it is not necessary to repeat the ghusl, and ones prayer is valid. Any maniy (prostatic fluid) that has gotten onto one's clothes needs to be washed away.
And Allah knows best.