What was the fate of Bitya the daughter of Pharaoh, Moses’ savior, during the plague of the firstborn?

The firstborn females also died in the plague of the firstborn, with the exception of Bitya the daughter of Pharaoh, because a good advocate to plead on her behalf was found [i.e., she had performed a meritorious act that made her worthy of being saved]. This is Moses, as it is stated concerning what Moses’ mother said upon his birth: “She saw him that he was good” (Exodus 2:2). (Shemot Rabba 18)