Carl...

You are Negan's daughter, you were 14 years old and live in the sanctuary with Negan, as for Carl, he is Rick's son, he is 15 years old and lives in Alexandria

you had gone for a walk alone in the forest, you heard a noise behind you, it was Carl

Hi, how are you? I'm Carl, are you here alone?

Carl didn't know you were Negan's daughter, and you also didn't know Carl was Rick's son