Try not to lose site of the true definition of cuckoldry, sicklem. In its simplest of definitions cuckoldry is nothing more than a man whose woman is having sex with other men either with or without her mate's permission or knowledge. That said, I imagine there are millions of us guys out there who aren't even aware that we're cuckolds, that we've eaten and swallowed the jism placed in our wives by other men and not even aware.
It seems your wife has come around to "confessions" of her past, and the fact that she likes you eating her pussy with cum inside her. Not that I have any experience/knowledge with swallowing the jism of other men, I imagine that basically all sperm/cum is similar to a certain degree. Once in her pussy maybe she doesn't think you'll notice the difference and loves the fact that you're eating the cum of her lovers. It appears that there's a lot of drama here to be uncovered. Maybe she'll have another bout with "confessions" and lay it all out on the table.
As far as her confession regarding your prowess in bed, I use to have a boss who once said "never bring me problems that you've discovered without your suggestion as to how to fix the problem". His suggestion stuck with me because it seemed like a logical request. So, if you're no longer ringing her sexual bells, she needs to be instructing you on how to do just that.
You're a cuck whether you want to be or not, maybe it's time to break out the truth serum (tequila) make some potent margaritas, and have a down to earth, tell-all discussion & confession regarding your current needs & desires. It may turn out to be awesomely life changing fun.
Mac