"Are you... Shrinking?", Asked Annabeth.
"No... Why?", replied Thalia.
"You've always been taller than me, haven't you?"
"Yes...", answered Thalia.
"Then why are you smaller than me?"
Looking at Annabeth, Thalia could clearly see that she was shrinking. She used to be a couple of inches taller than Annabeth, but now Annabeth towered over her. Thalia, when looking straight ahead, was level with Annabeth's stomach, which revealed another surprise.
"Annabeth, you're stomach is growing", commented Thalia.
Looking down, Annabeth gasped.
Her stomach was indeed growing. It was poking out from under her shirt. Her breasts had also grown, as her bra, which was normally loose, was now digging into them.
Thalia, by this point, wasn't just shrinking, she was regressing.
Her breasts had disappeared completely, and her black hair was starting to grow back into her head. She was now down to Annabeth's hips, and still shrinking.
"What's happening to me?", She asked, slightly scared.
Annabeth didn't reply, as she had figured out what was happening.
She had poked her stomach to find it wasn't fat, but solid. She also saw that as Thalia was shrinking, her belly and breasts were getting bigger. The most likely scenario?
Thalia was regressing into Annabeth's womb.
"ANNABETH!", shouted Thalia.
Looking down, Annabeth was startled to see that Thalia was just about to become an infant. She had very little hair, and baby fat had started to form on her. Reaching down, she picked up baby Thalia.
"I'm sorry...", She whispered in her ear. Thalia just looked at her, having lost the power to speak.
Annabeth just held her until eventually, she disappeared completely.
Grabbing her belly, Annabeth could feel kicks coming from within for a couple of minutes before they ceased.
Standing up, Annabeth undid her bra and let her huge breasts flop down. She could hear milk sloshing inside them.
Before walking off...