Raphael knew he needed answers. It's been ten years and Rowena was right, there might be something that prevented them from having children. He could understand if Rowena was still a mere human. Humans were full of problems. She might be born barren and there was nothing they could do about it.
However, the moment she drank the immortality potion, whatever weaknesses her body had, were all fixed. At least that's what was supposed to happen. Not knowing what's the problem would always make them feel in the dark.
That's why, finally, Raphael decided to pay his old home a visit. It would be good to come and see his family, and reconcile, while paying Esper a visit. He was contemplating whether he should bring Rowena with him or not.