My husband and I own a small company with 15 employees. Approximately 5 months ago we hired someone for an administrative position. Unfortunately, we are having a lot of trouble with her. After about 2-3 months, we realized that she does not produce quality work product, does not complete her assignments, is not pleasant on the phone (she answers phones for our company), she comes in late and wears improper attire. We have had discussions with her about the above and recently started documenting our discussions in memos to her. In her 3rd month of employment, she advised us she was pregnant. Of course, we congratulated her. Unfortunately, even after several warnings, she has not gotten any better. Recently, she was schedule to work, but did not arrive for work for two days out of the week. She returned the next week and had the excuse that she was unable to unlock the door, and thought we had changed her key and fired her, so she left. We told her that it was unacceptable that she did not show up for work for 2 days, without calling and gave her a written, final warning that if any other negatitve issue arose with her (i.e., late, not showing up, not completing her work) that she would be terminated, and asked her to sign it. She signed it then said said "You can do whatever you want. I will sign whatever you want. My attorney said that you cannot fire me because I am pregnant". She now has the attitude that she can do what she wants and will not be fired. We have never had to deal with an issue as this and I am uncertain if we can fire her now, because we certainly don't want to be sued for discrimination due to pregnancy. Can we fire her or not?