I was reading today's weekly portion and it caught my eyes (Shemot 18:6):
וַיֹּ֨אמֶר֙ אֶל־מֹשֶׁ֔ה אֲנִ֛י חֹֽתֶנְךָ֥ יִתְר֖וֹ בָּ֣א אֵלֶ֑יךָ וְאִ֨שְׁתְּךָ֔ וּשְׁנֵ֥י בָנֶ֖יהָ עִמָּֽהּ׃
And he said unto Moses: 'I thy father-in-law Jethro am coming unto thee, and thy wife, and her two sons with her.'
See also verse 3 with a similar phrasing, while verse 5 is using a masculine form.
If anyone had asked me, I would have said: and your wife and your two sons. Why it is important to stress that Gershom and Eliezer were Tzipporah's sons? I checked a few commentators, but haven't found anything yet. Does it have any relevance?