So my gf (21) and I (28) are very much in love. We see our future together. We both share very deviant sexual fantasies. My biggest are MMF and watching her get fucked. She recently said it's her biggest fantasy too. Anyway, tonight she said she doesn't want to do it because she's scared she will possibly start liking the guy. I dug deeper and she said she's only been either me and one other guy so she's scared she will enjoy the sex better with him and she'll leave me for him. How would you take this? I thought we were on equal fields and this thought never crossed into my mind if we had a FFM threesome so I figured it was the same for her. So it was shocking to hear. I take it as she doesn't enjoy me too much in bed and in her head knows there's much better. I'm not huge. I'm just under 7 inches long and 5 inches around. I'm confused and this really ruined things and shocked me. How could she be scared to leave someone you love over a random sexual encounter with a guy you've never met? Any ideas how to take this as I'm feeling super insecure and may end things over this?