So I'm in a bit of an odd spot, I'm 8 Years older than my Girlfriend, and 8 years younger than her step mother. I've been with woman older than her step mother, and honestly not younger than her (in terms of gap) We have a good solid 4 years together and I do love her, me and her step mother have been getting chatty, flirty even. I've found that when we have some of our chats and they get that way she does not tell me gf we have talked and I kinda keep silent as well. The other night a little while before my gf got home I got a text with some pictures from her step mother, something I never even would have imagined, not nudes but very tasteful and sexy shots of her in some green panties and matching bra, her husband is much older being my gf's biological father. In one picture is a picture of her toy, wet and the text accompanying it talking about how she things about a younger guy when she plays with herself. I'm at a loss, I cannot tell my girl and I do not want to cheat, but a part of me wants to go rail her step mother so hard, leave her satisfied, just once. Get it out of our system and move on so I can marry her daughter and continue with life. It seems so wrong, but feels almost like I have to. I'm afraid the text wont stop and ill get in trouble as well. Thoughts? Suggestions?