Farrah Abraham -- Brings Her Dad & Daughter to Sex Tape Negotiation

Question: Where is the last place on Earth you should bring your dad and your kid?
Answer: Your sex tape negotiation. Ewwwwwwwwwww!!!!!

But that's exactly what "Teen Mom" star Farrah Abraham did on Sunday when she hit up the offices of Vivid Entertainment to negotiate a possible deal for her sex tape.

Farrah told our photog she is negotiating with two other companies and that she is considering Vivid's offer. She said she only brought her father along "for support" ... but when you check out the video, you can tell how uncomfortable he is about the whole thing.

Our photog also spoke to Vivid honcho Steve Hirsch after the meeting ... and even he thought bringing a young child to a porn office was a bad idea.

At least someone is the voice of reason.