Meghan took to Instagram to announce the news on Friday, with an adorable photo of her dog, Girly Girl, with a sign reading "Happy Thanksgiving Mommy! I can't wait to meet my new sister!"
"@therealgirlygirl sent me this note while Jimmy and I welcomed our new baby girl on Thanksgiving!" she wrote. "Our hearts are exploding ? (Stay tuned for name, pics, baby info, and birth story info!)."
"From the hours leading up to the birth I had the most incredible husband, he didn't leave my side," she wrote, praising the former baseball pro. "I could not have labored naturally without him and my doula. Jimmy was a constant source of support through every contraction, each blood-curdling scream and each time I told him I thought I was dying and couldn't do it anymore."
"He ran baths, helped me walk, helped me breathe, held my hands, essentially endured the burden of my pain for all 22 hours. I am so proud and impressed of the team we made to welcome Aspen, our bond is more unshakable than I ever imagined," Meghan continued.
"We have a healthy, strong happy baby who loves breastfeeding and already holding her head up!" she gushed. "I feel like I worked out for a week straight and my throat hurts from yelling but I survived unscathed without so much as a tiny tear and now I feel like the strongest warrior on the planet (and Jimmy thinks so too) her birthdate 11/24/16 added up equals her daddy's baseball number 15 :)."
Later that day, Girly Girl finally met her little sister.
"Puppy and baby in love already @therealgirlygirl," Meghan captioned the cute snap.