Dont know how true this is. But a very good idea. What do you think?
Most likely not true, but Allah knows best. And not a good idea either.
It is our own responsibility to get up for Fajr, and spouses need to encourage and help each other to get up. It is not the wife's responsibility more than the husband's. It is the responsibility of both (see hadeeth below), so theoretically they should also be offering the woman payment to make to obtain khula from her husband on the grounds that he does not wake her up. This is not a blame game, nor is the purpose of prayer to damage families.
In a beautiful hadeeth:
"It was narrated that Abu Hurairah said:
"The Messenger of Allah (ﷺ) said: 'May Allah (SWT) have mercy on a man who gets up at night and prays, then he wakes his wife and she prays, and if she refuses he sprinkles water in her face. And may Allah (SWT) have mercy on a woman who gets up at night and prays, then she wakes her husband and prays, and if he refuses she sprinkles water in his face.'""
Reference : Sunan an-Nasa'i 1610
In-book reference : Book 20, Hadith 13
English translation : Vol. 2, Book 20, Hadith 1611
English reference : Vol. 1, Book 5, Hadith 1336
Arabic reference : Book 5, Hadith 1397
Both versions hasan.
May Allah give us all the tawfeeq to do good to ourselves and others, and to encourage and spread the doing of good, ameen.