Your wife should understand this. If she does not understand the worth of your care then you need to make her understand by making her aware about things which you have done and are doing. Honestly convey her that you are interested in peaceful and harmonious relationship and do not want her mother’s interference in any case. Do not allow your in-laws to enter in your personal life. If your wife is bringing them in between, stop responding them. Try to be indifferent to them. You do not have to afraid to tell right things to your wife in any case. Never succumb to emotional blackmailing by your wife or your in-laws.