It is unfortunate that they could not understand and support you during your pregnancy. Give some more time to your husband. Do not go out of the way to please him or his parents, otherwise they would demand more attention. Fulfill your duties honestly without seeking their appreciation and wait for some more time. I do not think you can do anything more than this at present. There is nothing wrong in contributing financially but your husband should be aware about it. If he has ego problem as said by your father in law then you tell him that you want to contribute by your own wish but at least he should be aware.