Islam does not believe Jesus is the Son of God.
Which the Bible teaches.
God was never married
The Bible makes it clear that while Yahweh created marriage in Genesis 1:28, he was never married, nor does God have a wife.
This means He has no sons.
In much of modern Christianity, God is addressed as the Father, in part because of his active interest in human affairs on the earth, in the way that a father would take an interest in his children who are dependent on him and as a father, he will respond to humanity, his children, acting in their best interests.
In general, the title Father (capitalized) signifies God's role as the life-giver, the authority, and powerful protector, often viewed as immense, omnipotent, omniscient, omnipresent with infinite power and charity that goes beyond human understanding.
The Lord is like a compassionate father to those who fear him (Psalm 103:13) “As a father has compassion on his children, so the LORD has compassion on those who fear him” A father cares deeply about the suffering and misfortune of his children.
Isaiah 64:7 – “Yet, Lord, you are our father; we are the clay and you our potter: we are all the work of your hand.” 1 John 3:1 – “See what love the Father has given us, that we should be called children of God; and that is what we are.