An offering: five sentence fiction

I am, once again, well behind in participating in Five Sentence Fiction (from Lillie McFerrin Writes).
Last week's prompt was Offering.  Here is mine, to you:

This was heartbreak, then. As the moments wore on he could feel all hope of happiness slipping through his fingers.

“But can’t you love me, even a little?” he begged from the very depths of his being.

“Oh, my dear David,” she said, with pity. “I cannot give you what is not mine to give. You see, Robert has my heart.”