"Welcome to the world Aspen Rose Sanders. We love you so much," Erica captioned the photos. "Our family already feels more complete. #babygirl #sisters #girlmom #newborn."
The former reality TV star announced she was expecting a baby on social media back in March.
Erica, who is already mom to 23-month-old Holland from her relationship with ex-fiance Galen Gentry, and Charles tied the knot in December 2017 in Texas in front of 300 guests, including many familiar faces from The Bachelor franchise.
Erica and the independent insurance adjuster exchanged vows only two short months after getting engaged at the Houston Zoo during Holland's first birthday party in September 2017.
Erica competed on Season 9 of The Bachelor and later starred on the franchise's Bachelor Pad spinoff for its second and third editions.
Erica initially vied for the affection of Lorenzo Borghese on The Bachelor's ninth season, and after appearing on two different seasons of Bachelor Pad, she also starred on VH1's You're Cut Off! reality series.