The 19 Kids and Counting star took to Twitter and Instagram to wish his son a happy 4th birthday

By Amanda Michelle Steiner
Updated June 16, 2015 11:20 AM
Credit: Kris Connor/Getty

Josh Duggar has broken his social media silence since news broke that he was investigated in 2006 for molesting five underage girls as a teen.

The 19 Kids and Counting star and his wife, Anna, both took to Instagram to wish son Michael James a happy 4th birthday.

The posts come nearly two weeks after Josh’s sisters Jill Dillard and Jessa Seewald came forward as two of his victims.

Josh kept it simple with a birthday wish, while Anna posted a video of her son blowing out the candles on a plate full of cupcakes.

“So glad to be in Arkansas celebrating Michael’s 4th birthday,” Anna wrote. “We love you Mikey!”

In a statement to PEOPLE, Anna likened Josh’s actions to “past teenage mistakes” and was confident that he “had humbled himself before God and those whom he had offended.”

Speaking to Fox News’ Megyn Kelly on June 5, Jessa, 22, insisted that Josh is not a “child molester or a pedophile or a rapist” and went on to say that he was “a young boy in puberty and a little too curious about girls” when he “inappropriately touched” her and sister Jill at “9 or 10” and 12 years old, respectively.

Jill, 24, added that she and the rest of Josh’s victims chose to forgive him once they moved past their anger: “We’ve dealt with it. We’ve already forgiven Josh. We’ve already moved on.”

However, what happened to them was “not like falling and scraping your knee where it bleeds, it scabs, it heals over,” Gail Wyatt, Ph.D., director of the University of California, Los Angeles, Sexual Health program, previously told PEOPLE.

“It’s not a normal childhood experience in that sense, that you can blow it off and assume there won’t be repercussions because of it,” added Dr. Wyatt. “That Josh apologized is important but does not suggest everything is okay.”

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Meanwhile, Jessa and Jill have also returned to social media to continue sharing milestones of their growing families and “are hopeful that they may be able to regain some semblance of normalcy,” a source close to the situation told PEOPLE.