Why enters in bathroom

A servant barges into the bathroom on his master and offers an explanation that makes the situation considerably more awkward.

Sahab:
Tum bathroom mei q ghus aye,
kia tumhain pta nahi tha k main naha raha hoon?
Mulazim:
Hazur galti ho gai,
main samjha tha begum sahiba naha rahi hain;-)