She became Muslim and was cut off by her non-Muslim mother

The sincere believer knows that one of the things that Allaah does is
to test His slaves by means of various kinds of trials in order to demonstrate their
patience and virtue, and to raise their status, to increase their reward for their
steadfastness, and to test their sincerity in following the truth. Allaah says
(interpretation of the meaning): And surely, We shall try you till We test those
who strive hard (for the Cause of Allaah) and the patient ones, and We shall test your
facts (i.e., the one who is a liar, and the one who is truthful). [Muhammad 47:31].
Among the different types of test are the various means which the mushrikeen may employ to
try to make a believer give up his faith, so they may apply psychological pressure to
annoy him and make him go back to kufr. Allaah, may He be glorified, has mentioned this in
His Book and has pointed out how we should respond. He tells us (interpretation of the
meaning): You shall certainly be tried and tested in your wealth and properties
and in your personal selves, and you shall certainly hear much that will grieve you from
those who received the Scripture before you (Jews and Christians) and from those who
ascribe partners to Allaah, but if you persevere patiently, and become al-muttaqoon
(pious), then verily, that will be a determining factor in all affairs, and that is from
the great matters, [which you must hold on to with all your efforts] [Aal
Imraan 3:186].

If what is being said or done by others is causing too much
psychological pain, then how much worse must it be when it is done by the closest of
people, one with whom you share ties of flesh and blood, the mother who gave birth to you?

The hurt caused by those who are related to you is more bitter
and painful/ to the soul than the blow of a sword. [poetry]

But when the believer is exposed to the most painful attacks from the
closest of people to him, he does not give in or retreat; he follows the Quraan in
his dealings with the mother who is hurting him or cutting him off and turning away from
him. This is illustrated in the following story:

Musab ibn Sad ibn Abi Waqqaas reported from his
father the mother of Sad swore that she would not speak to him, or eat or
drink, until he renounced his religion (Islam) and became a kaafir. She said, You
claim that Allaah tells you to honour and respect your parents. I am your mother and I am
telling you to do this. She stayed like that for three days, until she fell
unconscious from exhaustion. One of her sons, whose name was Umaarah, got up and
gave her water to drink, and she began to pray against Sad. Then Allaah revealed the
following aayah of the Quraan (interpretation of the meaning): And We have
enjoined on man (to be dutiful and good) to his parents But if they (both) strive
with you to make you join in worship with Me other of which you have no knowledge, the
obey them not, but behave with them in the world kindly [Luqmaan 31:14, 15].

(Reported by Muslim, 4432).

The Prophet
(peace and blessings of Allaah be upon
him) also suffered rejection at the hands of some of those who were most closely related
to him, such as his paternal uncle Abu Lahab, but this did not stop him from spreading the
message and conveying the religion, despite the harshness of the opposition. Rabeeah
ibn Abbaad al-Dayli, who later became Muslim, said: I saw the Messenger of
Allaah
(peace and blessings of Allaah be upon him) with my own eyes in the
marketplace of Dhool-Majaaz, saying, O people, say Laa ilaaha ill-Allaah
and you will prosper. He was going through the alleyways of the market, and the
people were gathering around him. I did not see anyone saying anything, and he did not
stop saying, O people, say Laa ilaaha ill-Allaah and you will prosper.
Behind him there was a man with a squint and a handsome face, and his hair in two braids,
saying, He is a Sabian and a liar. I asked, Who is this? They
said, Muhammad ibn Abd-Allaah, who is saying that he is a Prophet. I
asked, Who is this who is denouncing him? They said, His paternal uncle
Abu Lahab.

(Reported by Imaam Ahmad, 15448).

So, my sister, you should hold fast to your religion and
honour and respect your mother as Allaah commands. If she turns away from you and rejects
your kind treatment, there will be no sin on you, even if this hurts you, because you are
following the true guidance. Bear this with patient perseverance, for you are on the right
path of truth. And Allaah is the Source of strength.