Tell me what u do to your girlfriend parent, at the first time u came into her house ?

We know what you're up to and do everything we can to scare you. I didn't even realize I was doing it until my daughter spelled it out for me. I sharpened a knife or a hatchet, answered the door and got a reputation for being an axe murderer. It worked. Be polite. As a parent, I'm good with that. Be very good. We're watching you.

Yea first time is always awkward but use a mild firm voice Do a classic greeting, introduction moms are usually great at keeping small talk going but commented her on her house or property is always a solid respectful way to go good luck

You answer their questions. Examine the house of whats inside and compliment it. Be nice and assertive.