Is it permissible for a man to suckle from his female colleague at work so that their lawful seclusion becomes permissible?

Suckling in adulthood does not establish حرمة (prohibition of marriage) according to the relied-upon opinions of the four madhahib (schools of thought). A woman expressing her milk for an adult person does not benefit him. It is also impermissible for an adult to directly suckle from a woman's breast, as it is forbidden by Islamic law. Merely looking at a woman's awrah (private parts) or touching her is forbidden. Furthermore, the forbidden khalwa (private seclusion) is the gathering of a man and a woman in a place where they are secure from a third person entering upon them.