A Christian woman is asking whether her marriage to a Muslim is valid

 

Ever All-Aware of everything”

[al-Ahzaab 33:40] 

“Muhammad is the Messenger of Allaah. And
those who are with him are severe against disbelievers, and merciful among themselves.
You see them bowing and falling down prostrate (in prayer), seeking Bounty from
Allaah and (His) Good Pleasure. The mark of them (i.e. of their Faith) is on
their faces (foreheads) from the traces of prostration (during prayers). This
is their description in the Tawraat (Torah). But their description in the Injeel
(Gospel) is like a (sown) seed which sends forth its shoot, then makes it strong,
and becomes thick and it stands straight on its stem, delighting the sowers,
that He may enrage the disbelievers with them. Allaah has promised those among
them who believe (i.e. all those who follow Islamic Monotheism, the religion
of Prophet Muhammad till the Day of Resurrection) and do righteous good deeds,
forgiveness and a mighty reward (i.e. Paradise)”

[al-Fath 48:29] 

One of the reasons why He sent the Messengers was so as to establish
proof against mankind, lest they say, “No Messenger came to us and no
one told us that Allaah commanded us to worship Him.” Allaah says (interpretation
of the meaning): 

“Verily, We have sent the Revelation to
you (O Muhammad) as We sent the Revelation to Nooh (Noah) and the Prophets after
him; We (also) sent the Revelation to Ibraaheem (Abraham), Ismaa‘eel (Ishmael),
Ishaaq (Isaac), Ya‘qoob (Jacob), and Al-Asbaat [the offspring of
the twelve sons of Ya‘qaab (Jacob)], ‘Eesa (Jesus), Ayyoob (Job),
Yoonus (Jonah), Haaroon (Aaron), and Sulaymaan (Solomon); and to Daawood (David)
We gave the Zaboor (Psalms).

And Messengers We have mentioned to you before, and Messengers
We have not mentioned to you, — and to Moosa (Moses) Allaah spoke directly.

Messengers as bearers of good news as well as of warning in order
that mankind should have no plea against Allaah after the (coming of) Messengers.
And Allaah is Ever All-Powerful, All-Wise

[al-Nisaa’ 4:163-165] 

We call you, and everyone who does not follow the religion of Islam,
to hasten to obey the command of Allaah by believing in Him alone, with no partner
or associate, and to believe in His Prophet Muhammad
(peace and blessings of Allaah be upon him), whom Allaah sent to all of creation,
men and jinn alike. Allaah has commanded them to do this, as He says (interpretation
of the meaning): 

“O mankind! Verily, there has come to you
the Messenger (Muhammad) with the truth from your Lord. So believe in him, it
is better for you. But if you disbelieve, then certainly to Allaah belongs all
that is in the heavens and the earth. And Allaah is Ever All-Knowing,
All-Wise.

O people of the Scripture (Christians)! Do not exceed the limits
in your religion, nor say of Allaah aught but the truth. The Messiah ‘Eesa
(Jesus), son of Maryam (Mary), was (no more than) a Messenger of Allaah and
His Word, (“Be!” — and he was) which He bestowed on Maryam
(Mary) and a spirit (Rooh) created by Him; so believe in Allaah and His Messengers.
Say not: “Three (trinity)!” Cease! (it is) better for you. For Allaah
is (the only) One Ilaah (God), glory is to Him (Far Exalted is He) above having
a son. To Him belongs all that is in the heavens and all that is in the earth.
And Allaah is All-Sufficient as a Disposer of affairs”

[al-Nisaa’ 4:170-171] 

Allaah has told us in His Noble Book (the Qur’aan)
that He does not accept any religion other than Islam. Allaah says (interpretation
of the meanings):

“And whoever seeks a religion other than
Islam, it will never be accepted of him, and in the Hereafter he will be one
of the losers”

[Aal ‘Imraan 3:85] 

“Allaah bears witness that Laa ilaaha illa
Huwa (none has the right to be worshipped but He), and the angels, and those
having knowledge (also give this witness); (He always) maintains His creation
in justice. Laa ilaaha illa Huwa (none has the right to be worshipped but He),
the All-Mighty, the All-Wise.

Truly, the religion with Allaah is Islam. Those who were given the Scripture
(Jews and Christians) did not differ except, out of mutual jealousy, after knowledge
had come to them. And whoever disbelieves in the Ayaat (proofs, evidences, verses,
signs, revelations, etc.) of Allaah, then surely, Allaah is Swift in calling
to account

[Aal ‘Imraan 3:18-19]

 Do not forget that if you become Muslim, it will
be better for your children, so that they will not be confused or suffer from
mental anguish, and say, “Our father is a Muslim and our mother is a Christian,
so who should we follow?” 

Perhaps thinking through these matters more deeply will lead to a
good result, by Allaah’s leave. Strive to read a sound translation of
the Qur’aan, which is considered to be the miracle of the Prophet of Islam,
then read the biography of the Messenger Muhammad
(peace and blessings of Allaah be upon him), and how Allaah granted success
to him and his Companions, and how Allaah supported him with miracles, such
as making water flow from between his fingers and the splitting the moon, when
the mushrikoon (polytheists) asked for a sign – so he commanded the moon
to split, and it split in two – and other events which are recorded in
his Seerah (biography). And he also spoke of unseen matters which could
not be known except by means of Revelation, such as when he said that the empires
of the Persians and Romans (Byzantines) would be conquered before it happened,
and other matters which are indicative of his Prophethood. We ask Allaah to guide us all.