Re: Attracted to lesbian co-worker
From what you've written, I gather that you have not told this woman about your feelings. If so, be sure to keep it that way.
I'm guessing that with 2 kids under the age of 2 (twins?), that your home life revolves around the daily care of the kids. No doubt, you and your wife either can't or won't make some time for just the two of you. Thus, it's easy for you, once you're at work, to spend time chatting with this woman. Basically, you're getting from her (adult one on one time) that you are not getting from your wife. If I'm right, it's up to you to take the first step and make time for just you and your wife. If you can't find a sitter for a few hours for the kids, then you must make time for just the two of you when the kids are in bed.
Have you considered getting another job? From the way you spell certain words, I'm guessing that you aren't in the US? I bring this up because, perhaps, the job market isn't as bad where you are as it is here. If I'm correct, then consider looking for another job. That way, you could still maintain a friendship with this woman but you won't be seeing her every day. And with family responsibilities, the possibility of seeing one another after work would be near impossible.
If you can't or won't find another job, then it is really imperative that you and your wife work together to once again find closeness and intimacy. Perhaps, even marriage counseling could be considered if you two are unable to make some headway on your own.
In the meantime, remind yourself of how much you have to lose if you were to become intimate with this woman.
Best of luck to you!