Toddler watch mobile phone

I'm very pissed off when my mil early in the morning give my toddler watch phone. She said my toddler take out by himself but why can't she just reject him. She has been giving my toddler watch day n night whenever he make noise I alrd give in. But for this I have to stop her but she unhappy with me. Any mummies face this prob how do you all handle this?