Possible Clues:

• Arrest of secret police?
• Inactivity? Just sat about with little sister
• This would make one stagnate and perhaps ask your little sister not to go
• Secret police's period of inactivity
• Condition of arrested progress
• A littl saintly, as is stagnation
• Sister, don't go and stop the flowing like this
• Don't sound as if you are going, sister, while in such a state
• Assist doctor in stoppage
• E. German secret agents' inaction