If she is frustrated, then have an honest talk with her and ask if she would like to have a lover with a bigger cock than yours - because you love her and realise her sex life is not as good as it could be.
Emphasise that you love her and feel very lucky to have such a wonderful wife - and her having extra sex and attention from another man would make up for your small penis.
Promise to remain faithful to her - you have no desire to sneak off and fuck other women. If she thinks you might, then she won't take a lover. She has to feel her marriage is rock solid b4 she would allow herself to go out and have fun times.
Ask her to go shopping with you to buy some nice clothes so that she can look and feel her best when she goes out on dates with the new men in her life.
Also, do not show jealousy if she needs to spend a lot of time with her new boyfriends, as it is a bit like having two husbands, and she needs to work on each relationship, with honeymoon etc for her new lover.
Remain a great husband, but also be a wonderful cuckold reading all the cuckold stories you can so you can excel in your new role. The extra sex in her life will make her feel a lot happier, and she will be appreciative that you support her new lifestyle.
If she feels your continuing love, she may bring home creampies, and tell you erotic stories about what she got up to - of course, you will post the detail on Dark Cavern for our mutual enjoyment.