Good luck hun,
I found it difficult and im 21. No matter what age you are your always going to be their children and thats why its so difficult.
Although me and chris planned we didnt tell either sides of the family we were trying as we just found it would be much easier for us not too as both sides are very opinionated, And although it was a shock to them at first, both have come round.
My family are very tradditional and set in there ways and after a few weeks for them to get their heads round it they are all very much looking forward to it.
It was a little easier for me as i Live away from my family so i wasnt around them constantly when they were dealing with the shock/emaotional side so by the time i saw them again they had all warmed to it. However my partners parents werem't far enough away. Grr his mam interferes so much but thats a different story, LoL. At the end of the day their your family and should stick by your decisons if their right or wrong,
I hope it all goes well hunni.
XxX