My mother receives social security benefits and receives extra for under age child. Will my mother lose the benefits she gets for my sister and herself if i claim her?

My mother receives social security benefits and she also receives extra benefits because my sister is under age. If i claim both of them on my tax will my mother lose the benefits she gets for my sister and herself? She receives a check every month and because of my sister she receives more. If i claim them both will it affect the check she receives? Or do i need to just claim my mother and not my sister?Thank you.