| | Re: She cheated and got pregnant
You'll need to get a very, very competent lawyer to get you out of being legally and financially responsible for the baby.
Kick her out now.
The longer you delay, the harder it is for you to escape legal and financial responsibility. You wont be able to refute why you delayed in correcting the situation (for eg, getting your name off the baby's birth certificate, etc)
Talk to that lawyer now. Otherwise you'll be stuck paying to raise another man's child for the next 18 to 23 years. That's more expensive in more ways than a good lawyer now.