"I'm not a betting woman, but I have $50 on Secretariat with an old director friend of mine"

This quote by Shirley Booth implies that she is not an individual who typically bets on horses, however she has actually made an exception in this case. She has placed a bet of $50 on Secretariat, a racehorse, with an old director buddy of hers. This recommends that the director pal has some understanding of the horse and its chances of winning, which Shirley Booth trusts his judgement enough to place a bet on it. The quote likewise suggests that Shirley Booth values her relationship with the director, as she is willing to put her cash on his recommendation. It is possible that Shirley Booth is also positive in the horse's chances of winning, as she is willing to risk her money on it. In general, this quote suggests that Shirley Booth is willing to take a risk on her old director friend's suggestion, and that she values their relationship.