In Vedic astrology, numerous treatments are provided expressly for this scenario. Matching natal horoscopes is advised in arranged marriages to locate a good match. Marriage should be discussed only with mangalik in such instances. The Kumbh Vivah is an ancient cure. It involves tying the couple together with the threads of a sacred thread (svadhyaya) and a rope (vivaha). This ritual is performed at the time of their engagement or even before that if they have no money for the ceremony. In modern times too, there are many remedies available for mangalkar marriages. They can either be taken individually or as a whole. Sometimes, only psychological support is needed. With time, these problems too will be resolved. The most effective remedy is satsang. In satsang, you will find people who have found peace and happiness despite being in mangalkar marriages. Other than this, legal actions may also be taken against the husband by his parents or wife by her parents. These actions would require legal expertise and could cost much money. At the end of the day, it all depends on how much love and respect the two families share. If both the families don't want these marriages, then nothing can be done about it. Otherwise, members of both the families need to come to some sort of agreement to make their lives easier.