'No' is your answer

You close the distance and kiss her. Despite being surprised by your action, Lisandra reciprocates. After you break the kiss, you whispers, "No."

"No?" Lisandra says, hurt in her eyes.

"No," you repeat, "because I know that you're a good woman."

The look of hurt disappears, and is replaced by mirth. "You need to check your eyesight, My Lord. I'm an old whore past her prime time who will spread her legs for anyone interested."

"Yet you didn't and gave yourself to Father, knowing very well what it entailed. And that request, you're just testing me, I know."

Lisandra face looks a bit intimidating to anyone who didn't know her personally, as rumors swirling around cast her as a woman who seduces everyone in order to get her way. You've known that wasn't true, since if she seduces everyone in the castle, her infidelity would have caused her her life. In actual truth, she is a sweet but an unfortunate lady who is also lonely; she was ostracized by everyone for staying with your father as his mistress.

Because of that, you know that she didn't really want to become your wife. If any, she would have wished that you take her daughter's hand in marriage but she realized that you can't fulfil her wish.

"You're right," Lisandra admits.

"And that's why I said no, even though I really want to make you my lawfully wedded wife," you say. "After all, you are my first love."

"I know. Most men want to be the first love of every woman, and most women want every man to be their last love."

"I hope to be your last," you before kissing her, recalling Dobra saying something similar. "So, do I pass the test?"

"Exceptionally well," Lisandra says while smiling wanly.

"I want my reward,"

"What do you want?"

You push her down on the bed and start to kiss her.