Keep Someone' Heart?

Hi

There is a very common expression in my language whose literal translation in English would be something like this:

keep someone's heart

Or

hearten someone

We use this expression when someone does something only for someone else. A man goes to a party only because his wife wants to go there. A mother goes to the cinema to watch a film (she hates) only because her daughter likes it.

So, we use the expression this way.

1. He only danced there because he wanted to keep his wife's heart/ hearten his wife.
2. As a husband, you really don't know how to keep a heart.

I am sure the red parts are not natural English. Could you please tell me an equivalent?

Thanks,

Tom