This guy, trying to act like a father now when he ignored her her entire life and believed all the bad shit everyone was saying about her no questions asked. What a fucking tool.
Why bring up that the prince showed interest in her? He knows the type of relationship they have, which is none at all. Honestly, if you want to act like a father now, give her some money and let her leave like she wants. You missed your chance long before the MC became libertia, and the MC wants nothing to do with you or the prince. Forget about your damn self-pity party and move on.