It is one energy; that energy becomes light and in light there are different colors. Yet all these colors are only light and light simply means energy.
Understand it like this. There is electricity which is energy, and it is unmanifest. You can’t see it, you can’t touch it, you can’t experience it; nobody can. Yet, when it becomes light, you can experience it.
In the same way, it is one parabrahma (divinity), manifested as Shiva and Shakti, and then there is dialogue. These are all subtle phenomena. Simply remember this: all in one and one in all.
Tell your daughter not to leave her religion. She should continue to have faith in her religion and also have respect for the other religion. Explain to her that she should sit with her mother and respect her too.
Pujas, especially Durga puja have a lot of significance for Bengalis. Tell her to come home especially for puja holidays. Lay that down as a condition for her. Many times, when people get married into other religions, they are told to drop their own religions and not celebrate their festivals or follow their rituals; then there is a breakdown in the relationship between both the families. Tell your daughter to celebrate their festival too, and come home for her own celebrations.
Daughters should be able to have their say. Daughters should not live like slaves. In love, there is co-partnering, not slavery or bondage.