[Pukin Dog]

She used to complain that her hubby doesn't want enough sex with her, so she is getting it from a co-worker now.

If that is the case, then he is probably cheating too. Either that, or he has joined "the other team".

[krb]

or he has joined "the other team".

That's what she thinks, too.

[glory]

Now, this is simply not true. A lot of other things can contribute to why a spouse is not as amorous when we are talking a short-term lack of interest. Physical and emotional changes, life-changing events(births, deaths, job changes, etc), overworking oneself, etc can all contribute to lack of desire or at least lack of energy to act upon desire.
If I believed what you say, I'd be looking over my shoulder ever moment since my husband has had such a slump before and when he came out of it, with loving support and encouragment(that giving thing we are talking about in marriage), it was better then ever and back to regular frequency. It's just another bump in marriage that one must overcome, but apparently *SOME* women today can't handle the usual hurdles you face in marriage without crawling into another's bed. One word-INSECURITY!!