She knew very well that if her father went up to the Castle to borrow money it would be lent, or rather given, freely enough; but she also knew that the lender would almost certainly take the opportunity, the very favourable opportunity, to unfold his wishes as regards the borrower's daughter.

The one thing would naturally lead to the other--the promise of her father's support of Owen's suit would be the consideration for the money received.

How gladly that support would be given was also obvious to her, and with her father pushing Beatrice on the one side and Owen Davies pushing her on the other, how could Elizabeth be sure that she would not yield?
Beatrice would be the very person to be carried away by an idea of duty.

Their father would tell her that he had got the money on this undertaking, and it was quite possible that her pride might bring her to fulfil a bond thus given, however distasteful the deed might be to her personally.

No, her father must at all hazards be prevented from seeking assistance from Owen Davies.