小姨妈说她来大姨妈了
[xiăo yí mā shuō tā lái dà yí mā le]
In Chinese familial terminology, 'small-aunt (小姨)' would be an individual's mother's younger sister, while 'elder-aunt (大姨)' would be their father's elder sister; however, here '大姨妈' colloquially refers to menstruation. The phrase describes 'an aunt saying she got her period,' creating wordplay and potential confusion given its multiple layers of meaning.