Virgin Mary is Bhagavati's younger sister

Sisters and goddesses
From the Guardian UK By William Dalrymple:
Legend has it that it was the apostle, Thomas, the doubting one, who brought Christianity to Southern India - and now, aside from the odd jealous spat, the Virgin Mary and goddess Bhagavati are worshipped with equal fervour

"Yes, yes, the Virgin Mary is Bhagavati's younger sister," explained Vasudeva, the head priest, matter of factly, as if stating the obvious.

"But, for sisters, don't they look rather different from each other?" I asked. A calendar image of the goddess, pinned up behind him, showed Bhagavati as a wizened hag wreathed in skulls and crowned with an umbrella of cobra hoods. In her hand she wielded a giant sickle.

"Sisters are often a little different from each other," he replied. "Mary is another form of the Devi. They have equal power." He paused: "At our annual festival the priests take the goddess around the village on top of an elephant to receive sacrifices from the people. She visits all the places, and one stop is the church. There she sees her sister."

"Mary gets on an elephant too?"

"No," he replied. "But when the goddesses visit each other, the sacrifice in the church is just like the one we have here: we light lamps and make an offering. The priests stay in their church, but the congregation of the church receives us, and makes a donation to the temple."

"So relations are good?"

"The people here always cooperate," he said. "Our Hindus go to the church and the Christians come here and ask the goddess for what they want - for everyone believes the two are sisters."