Have a heart-to-heart

Have a heart-to-heart: ter uma conversa honesta com alguém, partilhar os sentimentos

“After we'd had a good heart-to-heart we understood each other much better.”

If you're not getting on well with someone, having a heart-to-heart can really help a lot.

Obs.: "Heart-to-heart" pode ser usado também como adjetivo, por ex.,  "have a heart-to-heart talk". ( www.englishclub.com)