To the OP:
Please do not tip your hand to the wife that you suspect Indian Princess is really Bunco Woman, until you have secured all of your finances and financial records. You may need to get with your banker, accountant, or anyone else who has anything to do with your money.
Identity theft is also a very real possibility. See about getting credit data bases "flagged" so that you are notified if anyone applies for credit in your name, etc.
I am NOT an expert here, but you DO need expert advice, and you do need it fast.
You could express strictly emotional concern with your wife -- emotional distress, like "Oh! What did she say about me? About us?" and "What did she look like?" and gather all of the information you can about the incident.
I got to thinking: These gypsy scammers get ahold of a new victim, knowing very little about them, and they have to figure out how to get to them. In this case, its simple mathematics: Female, 37, no kids = Probably wants baby, hubby may not.
Bunco Woman could use this to create divide and distress between your wife and you -- which is exactly what happened. Your understandably negative response to an unplanned pregnancy alert gave "proof" that you "don't love" her. I am sure Indian Princess put her up to it, gambling on the odds of how it would all play out.
Never tip your hand that you think Indian Princess is anything but a meddling nuisance. Do not let wife get wind of the fact that you suspect Indian Princess is a gypsy bunco artist.
Get your finances in order first. And do it thoroughly and quietly. NOW.
Keep talk with the wife on a "feelings" level, and you may be able to gather some more information.
But as it stands -- wife trusts Bunco Woman more than she trusts you.
You might consider calling the non-emergency number for your local police department and asking if they have anyone who handles bunco, confidence schemes, and gypsy fortuneteller type scams. They will not laugh or be shocked.
These things are quite common.
Hopefully you will be able to save your finances. Wife may or may not accept reality.