Why not. I absolutely think the inlaws have so many obligations and duties towards their dils and sils, esp the dil cuz hopefuly she is part of their family. They should provide her a comfortable home, environment and lots of love so that it becomes easy for her to adjust to her new family, new home. They have to be understanding towards her and do their best to make her feel comfortable and at ease.
I dont know where are you guys getting all these ideas from? We have obligations towards our neighbours, our helpers, maids, friends so what makes you think we dont have obligations for our dils.