meddle in (something)
To involve oneself in some situation or activity, especially that which one is not meant or welcome to be involved in. I would have gotten away with the money laundering if you hadn't gone meddling in the company's financial affairs! My parents are always meddling in my love life, trying to set me up on dates with guys I have no interest in.
meddle in something
to intrude [oneself] into something. I wish you wouldn't meddle in my affairs. Go meddle in someone else's business.