How can one deal with an atheist lesbian colleague and convince her to embrace Islam, while maintaining good character with her?

Residing in non-Muslim countries and a woman studying in their non-Islamic schools is fraught with dangers and prohibitions. However, inviting non-Muslims to Islam is one of the greatest acts of obedience. Therefore, the invitation to the woman should be completed with extreme caution, lest the female caller be drawn into the perversion she is upon. If there is fear of temptation or error, then she must be abandoned to safeguard one's religion and morality.