Mother-in-law blowjobs and swallowed the cum

The son-in-law and his mother-in-law engage in an affair, and during one of their encounters, he shows her his erection. The mother-in-law performs oral sex on him, not realizing when he ejaculates in her mouth. She allows him to release all of his semen into her mouth and swallows every drop, although it causes her some discomfort.