Ask her what she wants

Lisandra hesitates for a moment. "I'm lonely. It's as if there's no one in the castle who wants me around," she admitted, her voice barely above a whisper. "Your father was my only support but now he's gone and I just don't know what to do."

You stare at Lisandra, trying to predict what she would say next.

Emboldened by your full attention, Lisandra take a deep breath. "I want to you to bed me, so that my loneliness may be cured if even for a night," Lisandra admits, her eyes glistening with unshed tears.

You swallow hard as your throat suddenly feel dry. The words, in another setting would have been welcomed. However, she is surrendering herself to you because she is grieving and feeling lonely and wants you to take it away. That feels painful but at the same time, strangely erotic.