Walaikumasslam
There is a lot can be said but whatever i will advise will be purely as per my experience and understanding.
1. Firstly, your spouse has no obligation to take care of your parents as per islamic traditions but it is an obligation upon you. However, if she does help or take care of them she will be rewarded immensely in this world and hereafter as well.
2. If you cannot visit them with your child and spouse then you must arrange a domestic worker for the house chorus (if they want help) but if they want more than that (your family presence) then you should be with them.
They ask you as to what they should spend. Say: “Whatever good you spend should be for parents, kinsmen, orphans, the needy and the wayfarer; and whatever good you do, Allah is all-aware of it” [2: 215].
We have enjoined a human being to show kindness to his parents. With great difficulty, his mother carried him in her womb, and with great difficulty delivered him and his carrying and weaning took place in [almost] three months. Finally [after passing through all these stages] when a human being fully matures and becomes forty years old, he prays: “God give me the urge to express gratitude for your favour which you did to me and to my parents and do those righteous deeds which please you [46:15]