I wouldn't take offence. It sounds to me like she was trying to lighten her situation.

Something to keep in mind. Texting is cold and impersonal. It lacks the context that a real discussion would have. It lacks the tone and inflection of voice that a phone call would have. This tone of voice would have better communicated her meaning. Had this conversation occurred in a setting where you would have heard her voice you might have found no reason to take offence.