When Steven gave up so easily because she had lost the bet…she felt as if she lost someone very important. She doesn't feel like admitting it. But she actually did feel cherished at the corner of her heart seeing Steven wait for her in front of the cottage. She just felt aggrieved. Forgiving him wasn't a matter of if but rather of when.
This time around, she won't close her heart anymore. Actually, Old Han was right. Life is short. Even after centuries of research that had successfully expanded the life span of humans, it's still just a speck of dust when compared to the vastness of the universe.