"At one stage he grabbed her hand and rested it on his knee".
Timberlake had been snapped wearing his wedding ring earlier in the week but was not seen with it on during the night out.
The former NSYNC star "told friends Jessica's insecurity can sometimes drive him nuts and he wished she'd lighten up", added the source.
In pictures obtained by The Sun, Timberlake and Wainwright were touching each other but a source has confirmed to ET Canada that it was all "innocent". And judging by the contents of the pics themselves, well, the 38-year-old pop star has a LOT to explain to his longtime wife, Jessica Biel...
"They're filming a movie together and it was a group of people hanging out", the second source shared.
"Several cast members were there and it was just a cast gathering".
The source continues, "The video may look a way, but literally it was nothing". Some of the people close to the situation spoke about the rumours and said, "They were out with all the cast, crew, makeup artists, and everyone was just hanging out in a social setting", the insider continued, "They are just working together". News that "there is absolutely nothing going on between them". But things seemed fine between them a few weeks ago. "No validity to any other rumor other than that they are filming together". The couple tied the knot back in 2012 and they also have a cute little four-year-old son named Silas.
For what it's worth, other people can be seen standing near Timberlake and Wainwright. They are now working on a project together.