You succeed

You use your dagger to deflect her attacks, but she is trained in such ways, you can tell it from her first attacks! She isn't joking, she goes straight for your heart with each strike!

However, you have had your share of training too! Even it takes some time, but you manage to bring her down and disarm her. When she is beaten, you hold your dagger at her throat and bind her. After her defeat, you take her to her house and send one of your serfs to watch over your bound prisoner, until the inquisitors arrive tomorrow.