Shay McGuire from 90 Day Fiancé appears to have no children based on the available reporting I found about her season-12 story, which focuses on her relationship rather than any kids.

What’s known

  • Coverage of Shay’s storyline in 90 Day Fiancé Season 12 discusses her life in Paducah and her relationship arc, but does not mention children.
  • I did not find a reliable source saying she has kids, so the safest answer is none publicly confirmed.

Note

If you meant a different Shay from the franchise, the name is a little ambiguous.