There's Nothing Like Sisterly Love: Ultrasound Captures Twins Kissing Inside Mom's Womb

These twins have not yet been born, but they're already showing off how close they are.

Read: Holy Ultrasound! Christ on the Cross Appears In Mom's Sonogram

Identical twin babies Isabella and Callie were spotted in their mom’s belly sharing a tender kiss during a 25-week ultrasound.

“It was just so exciting to see them like that,” soon-to-be mom Carissa Gill of Croydon, Pa., told InsideEdition.com. "I didn’t think that they were going to be that close together, but they are, and it was just so beautiful to see."

Gill and her partner Randy Good were checking up on their twin daughters in an ultrasound last Tuesday when they saw the babies moving around in her womb.

"It first started off ‘Baby B’ was kissing ‘Baby A’ on the cheek and then they started getting closer and then they actually kissed on the mouth,” Gill said. “You can see their mouths open and close, it was just so cute.”

She said her gynecologist suggested she drink water before the ultrasound, but Good never expected a reaction like that from his daughters.

"His face just kind of dropped, like he was speechless,” Gill said, joking, “but he’s been speechless since the moment he found out we were having twins."

Read: Ultrasound Captures Little Dude Flashing Peace Sign in Mother's Womb

Despite having a rough start to her pregnancy, Gill said watching her babies interact like that made it all worth it.

"My heart was just so full," she said. "It was a photo that would make any new parent smile."

Watch: Mom Gives Birth Naturally to 13-Pound Baby Boy: 'I Was in Shock!'