No communication about sex....at all

So i have been here a while but this is my first post. Why now?

I am about to end my marriage due to no sexual communication. I have asked her about past encounters, present, past or future fantasies. And even daring do's and don't's. The answer is always the same " No, i don't have any at all".

I recently found she had a hidden email account and in those emails she shared that info with others but not me. When confronted with this fact she refused to talk on it at all. I only have two questions here.

Why am i excluded from that topic?

Is there any real reason i should try to work it out?

Yes, i still love her a great deal but to be lied to and left out for seemingly no reason, has taken it's toll on me.