She's a lesbian. She's always been a lesbian. But she was made to conceive, keep the bloodline going. And although her quiet life on the farm is relatively nice, she'll never be happy laying with a man.
So when she met you, you were like a breath of fresh air. Beautiful and perfect. You remind her of Ymir. Her Ymir which she misses every day. Ymir would want her to open up her heart and be happy again, even if it wasn't with her.
"I hope you don't mind me being so late," she chuckles a little, grabbing the ends of her dress, walking up the hill you two agreed to meet at. Her husband knows about her affair, and yet he doesn't mind. He knows Historia doesn't love him, and that's okay.
You sit under a tree on top of the hill, watching her with a smile.