SDAM-103 Fake girlfriend at work, a junior is asked to act as a partner for a nosy mother

A man introduces a junior at work as his girlfriend to reassure his mother who wants to see him have a baby. The mother checks on them every night, so the junior pretends to have sex with him, but intercrural play turns into real penetration. The setup leads to actual sex, with the junior's body and the man's pleasure at the center.