“No, it’s ok. I can keep a secret.” Martha told him honestly. She didn’t go around telling everyone about The Doctor or that there was life outside of earth to random people on the street, she had learnt it was more dangerous them knowing than not sometimes.
She did want to know more but he seemed nervous. “If it helps I’m not a stranger to the out of the ordinary.” Martha offered, hoping that would be more reassuring when it came to not telling anyone.