That is how I would expect to be treated if it was me.
What do you think?
I firmly believe that all spankings should always start and end on the bare bottom. In other words trousers and underwear should come down and the bottom bared before the spanking. The spanking has no effect over trousers or underwear in my opinion it makes it pointless as it won't have the desired effect. Whether your modest or not you are being spanked end of, so deal with it as it is supposed to be embarrassing and humiliating