Does a girl really love once in her life?

It is said, "larki zindagi mein ek baar mohabbat karti hay". What does this philosophy signify actually?

Let's suppose, a girl loves someone and later on could not marry him. Afterwards she marries some other person. So now what is the state of her love to her husband? If, according to the said philosophy, the previous one was her 'ek baar mohabbat' so what kind of this 'mohabbat' is? Or this is COMPROMISE (because she had already loved someone earlier i.e. 'zindagi mein ek baar mohabbat').

So what the husband is receiving from her wife:
. love (which he believes to be true)
. compromise love (which the wife knows what she is giving to him)

Does this 'kahi janay wali baat' work in real sense? Or should this 'nazariah' exist to classify the standard of love of a girl?

What do you say?