Tracy Liu and Kylie Garcia are good friends, and they go to the same middle school in Orlando, Florida. They often have lunch together, during which they discuss their families. Read the dialogue they had about families this Friday.

Tracy: 你家有几个人? Nǐjiā yǒu jǐgè rén?
Kylie: 我家有七个人,爸爸,妈妈,爷爷,外公,外婆,妹妹和我。你呢? Wǒjiā yǒu qīgè rén, bàba, māma, yéye, wàigōng, wàipó, mèimei hé wǒ. Nǐne?
Tracy: 我家也有七个人,我爸爸,爷爷,奶奶,哥哥,我继母和她的女儿。 Wǒjiā yě yǒu qīgè rén, wǒ bàba, yéye, nǎinai, gēge, wǒ jìmǔ hé tāde nǚér.
Kylie: 你怎么叫你继母的女儿? Nǐ zěnme jiào nǐjìmǔ de nǚér?
Tracy: 她比我小,我叫她继妹。 Tā bǐ wǒ xiǎo, wǒ jiào tā jìmèi.
Kylie: 你有宠物吗? Nǐ yǒu chǒngwù ma?
Tracy: 我有一只狗,也有一只猫。你呢? Wǒ yǒu yīzhī gǒu, yě yǒu yīzhī māo. Nǐne?
Kylie: 我有一只猫。 Wǒ yǒu yīzhī māo.
Tracy: 你外公和外婆是什么样的人? Nǐ wàigōng hé wàipó shì shénmeyàng de rén?
Kylie: 他们都很善良。我外公有点秃顶。我外婆很瘦。你的爷爷和奶奶呢? Tāmen dōu hěnshànliáng. Wǒ wàigōng yǒudiǎn tūdǐng. Wǒ wàipó hěn shòu. Nǐde yéye hé nǎinai ne?
Tracy: 他们年老了,不过他们很健壮。我爷爷很高,他有点好笑。在庆祝生日的时候,他总是吃很多蛋糕。 Tāmen niánlǎo le, búguò tāmen hěn jiànzhuàng. Wǒ yéye hěn gāo, tā yǒudiǎn hǎoxiào. Zài qìngzhù shēngrì de shíhòu, tā zǒngshì chī hěnduō dàngāo.
Kylie: 哈哈!蛋糕一定很好吃。你的生日是什么时候? Hāha! Dàngāo yīdìng hěn hǎochī. Nǐde shēngrì shì shénme shíhòu?
Tracy: 我的生日是三月九日,在春天。你呢? Wǒde shēngrì shì sānyuè jiǔrì, zài chūntiān. Nǐne?
Kylie: 我的生日是八月一日,在夏天。我在生日从不吃蛋糕,我吃冰激凌。 Wǒde shēngrì shì bāyuè yīrì, zài xiàtiān.Wǒ zài shēngrì cóngbù chī dàngāo, wǒ chī bīngjīlíng.
Tracy: 夏天太热了,吃冰激凌正好! Xiàtiān tài rè le, chī bīngjīlíng zhèng hǎo.
Kylie: 那是! Nàshì!

Tracy Lius family tree including paternal grandpa, paternal grandma, dad, stepmother, older brother, herself, cat, dog, and stepmother's daughter Kylie Garcias family tree including paternal grandpa, dad, maternal grandpa, maternal grandma, mom, younger sister, herself, and cat

Based on the dialogue as well as Tracy and Kylie's family trees, which statement is true?