London, March 28 : Hollywood actress, Thora Birch had to bear an extremely discomforting situation recently, when her father, former porn star Jack Birch insisted to be present on the sets while she was filming sex scenes for her upcoming movie 'The Winter of Frozen Dreams'.

Jack, who co-starred with Thora's mother Carol Connors in the notorious porno film 'Deep Throat', was adamant on watching is daughter's imitated sexual intercourse with co-star Dean Winters, despite the general rule to shoot sex sequences on a closed set.

Infact senior Birch was even advising camera crew on how to best shoot his daughter.

"It was so wrong. The director is saying, 'Harder! Faster!' and the father is giving Winters the thumbs up," The Sun quoted an insider, as telling the New York Post.

The producers had no comment on whether Jack forced his way into the sets for the sex scenes.

"We have no comment on that. We just want to focus on the movie," Millie Milka of Em and Me Productions said.

'The Winter of Frozen Dreams' is based on a true story of Barbara Hoffman, played by Thora, who worked at a massage parlour and murdered customers for the life insurance policies.