As she feels warm and loved, you use this to your advantage and push for BJ by the aptly roaring fire. She cannot say no and begins to blow you like a Missouri tornado. As soon as you are about to bust, you pull out without telling her and unleash a thick, healthy splattering if jizz all over her face. Before she can do anything, you grab her head and hold it as close to the fire as you can so as to not burn her but rather for the jizz to gently harden over her face. Once she has been glazed over, you pull her away for the fire, let her cool a moment and gently tap the hardened jizz glaze on her face with your dick, not unlike a crème brule with a spoon.
Note – this does not have to be done with a fire, you can also use a radiator, hot plate, etc.