Timberlake enjoys post-VMA party with Jessica Biel and mom

Multiple MTV Video Music Award winner Justin Timberlake skipped the after-parties in favor of a dinner with his mother and girlfriend Jessica Biel on Sunday night.

A group of friends also joined the pair for the two-hour dinner at Tableau restaurant in the Wynn Las Vegas' Spa Tower.

Sources have revealed that Timberlake and Biel sat side-by-side, and shared kisses during the dinner.

"(The couple) were so lovey-dovey. They were always touching and being very sweet with one another and in front of Justin's mom," People magazine quoted a fellow diner as saying.

Both Timberlake and Biel called it a night after the dinner, even though they were expected at parties all around the town.

A source said that Timberlake was feeling unwell despite his high-energy performances.

It was revealed on Monday that a doctor had advised the singer to give some rest to his voice after suffering "vocal strain" inflicted during his VMA performance and months of rigorous touring.

The magazine report suggests that Timberlake's two shows, scheduled for this week, have been postponed because he is unwell.