I assume you're an awesome one, but to be honest other Sags have tended to drive me a little nuts.
And that includes having both a mother and sister of that sign. Help me. lol Most not bad people though, just a couple of them.
At least dad was a Cap and sister brought in another Earth sign (Virgo) brother-in-law.
Nephew is a Gemini though, that's a new one for us and first air sign in the immediate/close extended family.