Maria Zhang, senior director of engineering at Yahoo Mobile, is being sued by Nan Shi, former principal software engineer Shi said she was coerced into having 'oral and digital sex' with Zhang, who allegedly promised her 'bright future' The engineer claimed she was fired after she complained about alleged harassment to Yahoo's human resources Yahoo has denied the allegations, calling Miss Zhang an 'exemplary' executive In a tech magazine profile in April, Zhang said she is passionate about mentoring other female engineers By Snejana Farberov and Reuters Reporter A leading woman executive at Yahoo threatened a female colleague with the sack if she did not have  sex with her, it has been claimed.
@highlight
Maria Zhang, senior director of engineering at Yahoo Mobile, is being sued by Nan Shi, former principal software engineer
@highlight
Shi said she was coerced into having 'oral and digital sex' with Zhang, who allegedly promised her 'bright future'
@highlight
The engineer claimed she was fired after she complained about alleged harassment to Yahoo's human resources
@highlight
Lawsuit says Zhang made Shi write work emails on the weekend 'right after sex'
@highlight
Yahoo has denied the allegations, calling Miss Zhang an 'exemplary' executive
@highlight
In a tech magazine profile in April, Zhang said she is passionate about mentoring other female engineers
conduct an investigation when Miss @placeholder complained about the advances.