[swores]

Forgive me, but a small grammatical FYI: it should be "my sister and me", not "my sister and I" - because you're both the object of the verb "raising". The way to think of it is imagining what word you'd use if not including your sister, would it be "when you were raising I" or "when you were raising me" (and then insert the "my sister and" without changing your pronoun).

[euroderf]

I was taught that in the subject position it would be "my sister and I" but that in the object position it would be "me and my sister", not vice-versa.

[hyperhopper]

That is the proper definition of the rule, the parent post put it in easier to remember terms.

[euroderf]

I speak of the word order. First me, then my sister.

[JKCalhoun]

Thank you, I like your way of remembering how to correct it (but too late for me to edit now).