"After Justin was spotted holding hands with his co-star, the couple took time to reconnect, spending much-needed quality time together," the source says. "Justin and Jessica love one another very much and weren’t going to let this come between them, more so since Justin told Jessica he didn’t cheat, and she believes him."
"The couple has put everything past them and has moved on," the source adds.
In fact, a second source tells ET that Timberlake, Biel, and their 4-year-old son, Silas, recently enjoyed a staycation at Hotel Bel-Air in Los Angeles.
The source notes that during their stay, Timberlake and Biel enjoyed one solo dinner as a couple, a dinner with two friends, and a lunch with two friends at Wolfgang Puck inside the five-star hotel.
"He was very attentive toward Jessica," the source says of Timberlake. "He was always touching her hand and his hand was often on her leg."
The source notes that the family checked in on Jan. 6, before departing on Jan. 9.
Back in November, after photos of Timberlake, 38, and Wainwright, 30, getting cozy surfaced, a source told ET that their night out with friends was "harmless," with Wainwright's rep adding that "there is no validity" to the romance rumors between the pair.
Shortly after the pics came out, Timberlake took to social media to apologize to Biel, 37, for his behavior.
"I stay away from gossip as much as I can, but for my family I feel it is important to address recent rumors that are hurting the people I love," Timberlake wrote at the time. "A few weeks ago I displayed a strong lapse in judgment -- but let me be clear -- nothing happened between me and my co-star. I drank way too much that night and I regret my behavior."
"I should have known better. This is not the example I want to set for my son," he continued of Silas. "I apologize to my amazing wife and family for putting them through such an embarrassing situation, and I am focused on being the best husband and father I can be. This was not that. I am incredibly proud to be working on Palmer. Looking forward to continuing to make this movie and excited for people to see it."