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demand (something) of (someone or something)
To insist that someone or something do, provide, or relinquish something. I demand the full attention of my students, so if you plan to nap or socialize in here, then you might as well drop this class right now. You're really demanding a lot of our washer by throwing such a big load in there.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*tough on someone
severe and demanding in dealing with someone. (*Typically: act ~; be ~; become ~; get~.) My boss is very tough on me, but I need the structure and discipline.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.