Better not be alone with her anymore.

My neighbors and best friends have a young daughter who just turned 25 and returned home after getting a divorce. I've known this young lady all of her life and she thinks of me as a favorite uncle. The problem (with me) is that now that she has flowered, has become a very attractive young woman, I find myself being drawn to her in a very unhealthy way. Read between the lines. My wife is in a hospice, dying of terminal cancer of her cervix. This young lady visits me often. She likes to cook my meals, spend time watching TV with me etc. My being so horny for her feels kind of sick to me, but I seem to have it in my head that she feels so sorry for me that sex is not out of the question. I tell myself that this is just an illusion brought on by grief and profound loneliness. Then again . . . Well, you see my problem. If I made any type of sexual overture to this very kind, beautiful young lady it would turn into a disaster. But sometimes I get so overcome with my attraction to her I just want to cop a feel or something. Would this be normal? Would she understand? Would she give in? I need support. Please everybody, tell this dirty old geezer to keep his hands to himself. Thank-you.