Bobert, I gather you are worried because this woman "freaked" because you were coming home early?

It feels to me that this woman feels comfortable with your lovely, trusting P-Vine, and is rather (or very) wary of the rest of the world, possibly particularly men- not that she fears you in particular, or has 'designs' on your lovely lady.

I think you must just carry on being interested and supportive, letting P-vine know you are happy to listen to what she tells you about this woman, without getting uptight or defensive. P-Vine may be naive in your terms, but I guess she knows a lot about people and relationships. She will need you as a sounding board to talk over her concerns about this woman; not to make her decisions for her but to listen supportively.

Make sense?