@Bestrong1976,
Please, do tell me if you ever felt your wife was very sexually aroused with you by you? Maybe you 2 had a nice quiet sex before an affair and you weren't so crazy as you are after an affair.
Maybe being mild like she is now - is her way that she always had been?
Another think I am suspecting is that being not so sex crazy she had decided to see if it is you. And had an affair...
But you said it yourself she dumped him as soon as you wanted her to stop it. Right? So there was no value in that man for her.
What if its just your hurt feelings imagination about her being colder than before?
I am just hoping you are going to be cured, both, soon.