Praise be to Allaah.
No one has any rights equal to the right that parents have
over their children. Allah has mentioned their rights alongside His rights,
as He, may He be glorified and exalted, says (interpretation of the
meaning):
“And your Lord has decreed that you worship none but Him.
And that you be dutiful to your parents. If one of them or both of them
attain old age in your life, say not to them a word of disrespect, nor shout
at them but address them in terms of honour.
24. And lower unto them the wing of submission and
humility through mercy, and say: ‘My Lord! Bestow on them Your Mercy as they
did bring me up when I was young.’”
[al-Isra’ 17:23, 24].
But that does not mean that you should not be kind to and
treat well those who were kind to you and treated you as a daughter, or that
you should not try hard not to upset them. Allah says (interpretation of the
meaning): “Is there any reward for good other than good?” [ar-Rahmaan
55:60].
Your mother’s maternal aunt and her husband have treated you
very well and been very kind to you, so you should respond to their good
treatment in like manner, even if it is a kind word or good treatment to
your maternal aunt, and also offering du‘aa’ for them.
It is not essential for the du‘aa’ to be for one’s parents in
order for it to be accepted; rather if you offer du‘aa’ for any Muslim, that
is one of the du‘aa’s that are answered, as it was narrated that the Prophet
(blessings and peace of Allah be upon him) said: “A Muslim’s prayer for his
brother in his absence will be answered. At his head there is an angel who
is appointed, and when he prays for good for his brother, the angel who is
appointed says: Ameen, and you will have something similar.” Narrated by
Muslim, 2732.
So how about du‘aa’ for the one who treated you so kindly and
took such good care of you? That is more deserving of being answered.
Do not worry about a response or be distracted by thinking
about how effective your du‘aa’ will be; rather your concern should be
focused on making the du‘aa’ sincere and putting your trust in the vastness
of Allah’s bounty and the greatness of His mercy towards His slaves.
You should also remember that honouring one’s parents does
not stop when they die; you can still honour them by offering du‘aa’ for
them, honouring their friends and relatives, and fulfilling their promises.
Remember that your mother’s maternal aunt is also a maternal
aunt to you and her right to honour and kind treatment is great.
And Allah knows best.