Dear San Pedro: Well, there is a huge "ick" factor. Aside from that, this girl is only 22. The loss of her mother brought you two together, but in a superficial, and likely temporary, way. We can understand what appeals to you — she looks like Mom, she is young and vibrant and makes you feel like a teenager, and you have a loss in common. She may love you, but it could be as the father figure who has been missing from her life. If you truly love her, please give her the time, opportunity and freedom to figure it out.
Sparknotes: bang her like a hammer, karma will figure out the rest