"Whoa, mommy's as squishy as Thor and Thrud, I bet you want to rest your head on her, like you do with uncle Thor?" Casey said to Rocket.
It was now a few months later since Zora had said to them that she was with kit, along with Hope and Mantis throwing her a baby shower, so it was almost time for the baby or kit to come which should be anyday, which both Casey's dad and the others told Casey when she asked them, when her brother or sister was coming which they thought cute, guessing she was excited to be a big sister.
"If I did, it might hurt your brother or sister which we don't want, which was why I baby-proofed the compound just in case, plus the kit decides when it comes, so we just have to wait." Rocket told her even though he knew she was done waiting.
They then saw a frantic looking Soren, making Rocket guess what was happening, telling Casey to stay put, until he got back, because her mom was giving birth to her brother or sister which he did not want her to see, because it would be too much, then she would ask questions, ones he or her parents were not ready for yet until she was older.
Much later, Casey saw her uncle return after waking up from an nap, wondering what was going on as he led her to her parents's room making her realise what had happened, seeing Rocket nod, saying she couldn't be too loud even though she was excited, making her understand, because she did not want to scare her brother or sister
She was surprised seeing her mom had given birth to a female kit, making Soren and Zora happy by her reaction, seeing Casey holding her gently, taking a photo seeing the infant a little upset, seeing Casey rocking her gently.
"It's alright, Terra, mommy was just taking a photo of us, because you just got here." she told the infant, seeing her calmer, seeing that their older daughter had just namedher little sister and she loved it, impressing them and Rocket.
"That's a really cool name you gave her, and she's gonna fit in fine here." Rocket said to Casey seeing her nod, after giving Terra back to her mom leaving so her parents and Terra could rest which was a good idea, since she had a lot of questions on her mind, like if her sister would have powers, making Rocket nervous at her
"Yeah, my sister is really cute, and we can help my parents with Terra." Casey replied to him.
That late night/early morning, Casey could hear the sounds of her little sister crying, making the female kit worry, going to where her parents's room was where Terra's crib was seeing her parents asleep, going there remembering Rocket saying that babies cried to tell what they wanted, makimg Casey guess Terra was hungry.
"It's okay, I can get you milk while mommy and daddy are asleep." Casey told her, after pickimg her up, using her super-speed power makimg Terra giggle arriving in the kitchen, remembering where she saw Rocket put the baby bottles putting milk in one, feedjng Terra which was makimg her happy, just as Rocket walked in, relieved.
"I heard Terra crying, so I went to check on her, so I decided to feed her." Casey said surprising him.
"That was a good idea, but go to bed, since your folks and I can deal with Terra." he told her.
Casey then left the kitchen, hoping her sister would be alright, seeing her dad there, hearing Rocket tell him, impressing him, that Casey had helped her sister out, which was a big help to them.
"Yeah, she was helping Terra out." Rocket told Soren.
Later that morning, Thrud along with Sif and Thor noticed that Casey, Soren and Zora were exhausted while takimg care of Terra which was what happened with an newborn, knowing they needed more sleep to function, which Rocket agreedwith, plus Peter wanted Casey and Thruds's help with a project, so would wait until Casey was more awake.