OMG its like that with my in laws, we like you had the rough and tough experience, we dont do kissy, touchy but my hubby and his family, its like evertime they wake up, when they go to sleep, when he puts some new clothes on, when we get new furniture, when we get them something, when we go out to dinner, its so frustrating!!!
the worst part is, my hubby expects me to do the same!!! i started off doing it but what doesnt come naturally is not something that i can keep up, so i just whisk past them when saying goodnight, or goodmorning. He says this is a show of appreciation.
and OMG again, he like discusses everything with them as well, whenever anyone of them answers the phone they put it on speakerphone so everyone can hear, i was like i dont do that, and i think they were offended to start with, at the same time frantically txting my sisters and friends not to say anything incriminating cause its all open here 
dont start me on the food, thats just another ritual where we kiss and hug and “appreciate” the culinary delights of his mothers cooking 
and then when ever we go shopping, we have to parade all our purchases to them WTF!!!
Good job i only get to spend a few months with them each year