"She's good," Amy tells Us of Anna, who is raising daughters Mackynzie and Meredith and sons Michael and Marcus while Josh seeks treatment in an Illinois rehab center. "I talk to her a lot. She's doing good. She's stronger than I would be, I'll tell you that. There's no way I could handle that...I would handle it so different, oh my gosh."
PHOTOS: Biggest cheating scandals ever
Anna, 27, has been publicly silent since Josh, also, 27, was linked to the infidelity website Ashley Madison this past summer. She stood by him, however, through his previous crisis this spring, when it came out that he'd "inappropriately touched" five young girls (including sisters Jill and Jessa) when he was a teenager. As of September, the two have been married for seven years.
Anna Duggar and Josh Duggar pose during the 42nd annual Conservative Political Action Conference on February 28.
Credit: Kris Connor/Getty Images
Credit: Kris Connor/Getty Images
Amy, meanwhile, is a newlywed, having said "I do" to love Dillon King on Sept. 6 in Bentonville, Ark. (Anna attended with her in-laws, sans Josh.)
After the wedding, the bride and her husband jetted off to Cancun, Mexico, for their honeymoon. They returned in mid-September with a lot of great memories -- but no little bundle of joy, much to some family members' disappointment.
PHOTOS: Jill Duggar's wedding album
"There's no honeymoon baby," she tells Us. "My cousins asked me when I got back -- they were like, 'Are you pregnant?' And I was like, 'Uh, no.' And they looked shocked. I mean, shocked! They were...almost upset, you know? [We're] definitely not planning anything, not anytime soon.