Saw my friends mum naked, how do I stop thinking about her?

This may or may not be anywhere close to youre situation. My boyfriend/livein is 17years younger than me and he said he done the same thing with me. He is younger than two of my daughters and if we were married he would probably be the youngest grandfather in history .lol He or gramps is 25 years old i'm 42 and have three daughters 27, 26, 21 a son 14 and three grandsons. We don't see age as a number. We see the inside and thats what counts. My man says to tell you it is true what they say about older women they sure know how to please a man!!