He only asked for two bottles for his father-in-law and mother-in-law, mainly because it didn't hurt to give away things that came for free, and he was always generous toward his in-laws.
In terms of showing filial respect, he generally tried to be fair, giving as much to his in-laws as he would to his own parents.
But his own parents didn't need much extra attention from him.
He was good to his in-laws, so Jiang Luoluo would reciprocate by treating his parents twice as well. Both being only children, they'd surely end up looking after both sets of parents together in the future.
"Two bottles?" To his surprise, when Jiang Luoluo heard that he was giving two bottles to her parents, she shook her head repeatedly, "Such a large bottle, one is enough for them to drink for a long time; giving two is too wasteful."