"During my pregnancy, my family walked through some very difficult times. A lot of things from my oldest brother's past were brought up and it was just really difficult for us as a family to walk through that again. Relive that," said Seewald.
Seewald said she defended her brother after a scandal from his past was made public last summer. But several months later in August, Josh publicly confessed to being addicted to pornography and to being unfaithful to Anna.
"It was very difficult and we cried a lot of tears. I felt like it was especially difficult for me because I had spoken out in defense of Josh and had stood up for him and then there was a whole another wave of things that came through," said Seewald. "It was really difficult for me to just be like, 'I stood up here, I spoke out for him,' and yet there were some things he was hiding and wasn't being honest about. It was very emotional through those months after that, just working through all that."
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Seewald, 23, went on to say that the struggles made her and husband Ben Seewald even more committed to each other.
"For us as a couple, it even strengthened our resolve to be true to our wedding vows and to always keep our first love, which is God and pursue that and then to pursue each other 100 percent. I feel like we as a couple, even drew closer together through the difficulty," said Seewald.
On last week's episode of Counting On, Anna spoke out about Josh's then-upcoming release from a faith-based rehab facility.
"I think it's daily, there's going to be a lot of work and there kind of is a long process ahead, but we'll just kind of take it one day at at time and keep trusting god and doing the right thing," Anna said. "I think there's lots of hope for the future and a lot of excitement. But, in some ways, there are a lot of steps before it's where it needs to be."
The two-part finale of Jill & Jessa: Counting On concludes Tuesday at 9 p.m. ET on TLC.