Two moms are leaping into this Mother’s Day with new leases on life after overcoming major medical issues that put their babies at risk. One mom is celebrating the holiday with a brand new kidney — but has refused to slow down, telling The Post the scar and staples along her stomach remind her of the strength she harnessed to save both her life and her son’s. Fatimah Sheperd, a veteran FDNY dispatcher, had suffered through daily dialysis treatments and a 5-month hospital stay in 2024 to deliver