This is how my wife felt for many years. Thankfully, she finally listened to the devil on her shoulder.
My wife having a date 2 nights in a row with 2 different guys only happened a few times, but I loved it when it happened.
Your wife decided it was time for the two of you to have "the cuckolding talk" -- and however painful it may be for you to hear this, you can't deny that what she has said about your sexual inadequacy is true, and you know there is nothing you can do at this point to change her mind about starting to date other men. You do wish she weren't going out with one of your friends, but that's also not something you can change.