Michael Martin Lee Teck Heng would commit the obscene acts while his unwitting female students sat in front of him in his home. SINGAPORE: A man who tutored female students at his flat would commit sexual acts as he stood behind the teen girls, even touching them with his private parts. The girls would be unaware of these acts as Michael Martin Lee Teck Heng, now aged 58, would place his hand on the back or shoulder of the girl to disguise the contact. His offences came to light after the