Minute of Simeon

The one minute extra that you are always entitled to stay under the shower, no matter what. Named after its inventor, Simeon.

Wife: almost ready showering? I'm late for work.
Me: I'm finished in 10 sec, you can undress
10 seconds later...
Wife: okay, let me in, my turn
Me: no, I am not finished yet
Wife: but you said you were done
Me: Yes I am done... so now I am havig my minute of Simeon
Response suggestion
Wife: Ahh okay, almost forgot, one is always entitled to that minute, I will wait patiently.