en_tn/exo/18/02.md

took Zipporah, Moses' wife ... and her two sons

Possible meanings are 1) Jethro took Zipporah and her two sons to Moses, or 2) Jethro had earlier welcomed back Zipporah and her two sons.

after he had sent her home

This is something Moses had done earlier. The full meaning of the can be made explicit. AT: "after Moses had sent her home to her parents" (See: rc://en/ta/man/translate/figs-explicit)