Final answer:
The statement indicating manipulative behavior is 'I'm only here because someone insisted we come.', as it shows a lack of engagement and possible coercion, which are both manipulative tactics.
Step-by-step explanation:
The behavior that indicates manipulative behavior in a family member during a counseling session is "I'm only here because someone insisted we come." This statement does not display a willingness to participate in the counseling session or an open-minded attitude towards potential changes for health improvement. It suggests coercion or external pressure, thus indicating a lack of genuine engagement in the process, which can be a form of manipulation to deflect responsibility for the situation.