Anyone who would bring a life into this world as a bargaining chip is someone I would want NOTHING to do with. I don't care what the circumstances were.
To do that... she sounds off her rocker, and I think it is very practical and smart to be cautious. Settling for the first opportunity is not a good idea whatsoever! Your BF should just take it as a sign that he will find someone, that there are people out there open to poly, but making a choice out of feeling desperate usually leads to disaster. You're in So. Cali? Oh, don't worry, there are other poly women there!