Drama, drama....?

So I went to Kentucky to see my fiance for basic training graduation with his family and I called his sister a drama queen. (Which she is. She's 17 year's old and thrives on it.) Anyway, since we've gotten back she hasn't called or texted me. I apologized via text and left a voicemail message on her cellphone which she hasn't responded to. Now I'm just getting pissed. Should I just give up or keep trying, because this is my fiance's family after all and I don't want to cause a rift. Is it me or is she being a little dramatic? We were close before this and now I'm not sure what to do and I'm not sure if I should tell my fiance or not.