嫡亲

dí qīn dì xiong

嫡亲弟兄

brothers by blood

dí qīn jiě mèi

嫡亲姐妹

the elder sister by the same father

dí qīn zhí zi

嫡亲侄子

a nephew by blood

tā xiàn zài zǒng shì kǒu kou shēng shēng zì chēng shì nǚ wáng de dí qīn hòu yì

她现在总是口口声声自称是女王的嫡亲后裔。

She is now claiming that she's a direct descendant of the queen!