In 1st Chronicles 4:18 it mentions a man by the name of Mered taken Pharoah's daughter Bithiah to wife. While researching who exactly these individuals were, the consensus states that this Bithiah was the very same woman who found Moshe during the Parashat Shemoth (Leviticus Rabbah 3) (https://www.sefaria.org/Megillah.13a?lang=bi)
What sparks this question was Mered taking her (Bithiah) on as a wife. Was this before the Exodus? After? During? Being how Moshe came back on the scene at 80yrs of age, how much older was Bithiah than Moshe?