All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
First of all, you should obey your mother, keep good company with her and obey her within what is permissible [i.e. in what is not a disobedience to Allah], and you should return to her some of the good, affection and love she offered to you while you were a child. You should remember the saying of Allah (which means): {Worship Allah and join none with Him in worship, and do good to parents.} [Quran 4:36]. Allah also says: {And We have enjoined upon man [care] for his parents. His mother carried him, [increasing her] in weakness upon weakness, and his weaning is in two years. Be grateful to Me and to your parents; to Me is the [final] destination. But if they endeavor to make you associate with Me that of which you have no knowledge, do not obey them but accompany them in [this] world with appropriate kindness and follow the way of those who turn back to Me [in repentance]. Then to Me will be your return, and I will inform you about what you used to do.} [Quran [31:14-15]
Allah further says: {And We have enjoined on man to be dutiful and kind to his parents. His mother bears him with hardship and she brings him forth with hardship, and the bearing of him is thirty months.} [Quran 46:15]
Besides, Abu Hurayrah narrated that a man came to the Prophet and said: “Who is more deserving of my good company? The Prophet replied: “Your mother” Then the man said: “Then, who? The Prophet replied: “Your mother”. He said: “Then, who.” He replied: “Your mother”. The man said: “And then who? The Prophet replied: “Then your father” [Al-Bukhari and Muslim] There are many other verses and Hadeeths which urge us to be kind and dutiful to the parents.
However, this obedience mentioned in the Hadeeth is limited to what is permissible (in the Sharee’ah); what is permissible in this respect is that your salary should stay under your hand and then you should give to your mother what she needs, and not the opposite. The supervision of properties and money should be in a man's mission as he is the protector and provider (of his family); Allah Says (what means):
{Men are the protectors and maintainers of women, because Allah has made one of them to excel the other, and because they spend from their means).} [Quran 4:34] This is general even if it was mentioned in the context of wives. However, you should try to convince your mother in a way that pleases her. You should know that some mothers are too sensitive as far as their son's wives are concerned. This sensitivity might lead them to act in some improper manner. At the same time, some wives may act in a way that angers their husband's mothers. In this case, the son should stop his wife from angering his mother and oblige her to give good company to his mother.
Allah knows best.