hrnydude:
She has mentioned that she's afraid she won't want me anymore, or I won't be able to please her anymore
You can work through that. If you decide to do this together it will actually bring you closer as a couple. She'll love and want you even more, because you'll be giving her the freedom to enjoy greater pleasure, experience the excitement of being with someone who is better hung, and expand her sexuality. She'll appreciate having such a wonderful husband, because then she will basically be able to "have her cake and eat it too" (have you AND a well hung lover).
As far as pleasing her after she's with someone else, women are emotional creatures. Pleasing them isn't about a big dick. It's so much more... love, trust, emotional bond, etc. So, if she's a little stretched out after using a dildo or fucking a really well hung guy that just adds to the excitement of the experience. Physically, she'll snap back. You read about pussies being "ruined" by a big dick, but the reality is that pussies are very flexible. Unless a guy is so big that he literally rips something requiring stitches your wife will be back to normal within a few hours. The tightest woman I ever had was a mom of three... LOL
cuckold - Pronunciation - kuk-uhld - noun 1) The husband of an unfaithful wife. 2) A husband whose wife has sex with others. NOTE - It does NOT say: Sexually confused, submissive, humiliated, sissified, crossdresser, cocksucker, or piss drinker