Qìngjiāmǔ lái wǒ jiā zuòkè, wǒmen liáo le yī zhěngtiān.
The mother of my child's spouse came to visit, and we chatted all day.
Tips
usage
亲家 (qìngjia) refers to the relationship between the parents of a married couple - not the in-laws from your own child's perspective, but the reciprocal relationship between both sets of parents. Note the irregular pronunciation qìngjia, not qīnjiā.
