Ciara breaks down in tears while visiting children's hospital with husband Russell Wilson

Emotions were running high for Ciara when she greeted the patients at Seattle Children's Hospital.

The 31-year-old pregnant singer joined husband Russell Wilson for his weekly visit to the hospital, where she met Wesley, a 20-month-old patient who is said to not have much longer to live. Upon meeting the little boy, Ciara burst into tears at his bedside and had to walk away to gain her composure.

In a video posted to Wilson's Facebook, Ciara asks for prayers for Wesley. "Pretty tough for me being a mom, because I didn't even know what to expect when I walked in there and angel baby," she said with tears still in her eyes. "We both said prayer. I said a prayer for him and we did handprints and stuff, that was really sweet. So really, really tough time, very special time."

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Ciara added, "Go Wesley. Let's all say prayers for Wesley because miracles are real and they do actually happen and prayers do change and do make a difference and everybody let's pray together for Wesley."

Wilson was also inspired by the boy, and shared a photo of the couple's handprint artwork they left beside his bed. "Wesley is an inspiration to Ciara and I!" he captioned the pic. "We even got to do arts and crafts with him at Seattle Children's. My hand was just a tad bit bigger! Please pray for Wesley as they say he doesn't have much longer to live but we are praying for a miracle!"

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The NFL pro and his wife have lots to be thankful for this year. At Sunday's American Music Awards, ET spoke with Ciara about how excited her 2-year-old son, Future, is to have a baby brother or sister. Check it out: