have somebody's interests at heart

have (one's) (best) interests at heart

To be primarily concerned with what would benefit one. I know you don't agree with some of the decisions I've made, but you have to trust that, as your mother, I have your best interests at heart.
See also: have, heart, interest
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

have somebody’s (best) interests at ˈheart

want somebody to be happy and successful even though your actions may not show this: As a father, he always had his little girl’s best interests at heart.
See also: have, heart, interest
Farlex Partner Idioms Dictionary © Farlex 2017
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