Please help. My (soon-to-be) fiance and I have been talking about getting engaged for quite some time. Last year, my sister and her fiance got engaged and the wedding will be in May 2015. We have been talking about having our wedding in December 2015 or January/Feb 2016. I do not know exactly when we will make it "official" but I do know that my fiance plans to talk to my parents beforehand.
Anyway, how long should we wait before making it official so as not to take away my sister's shine? Do we have to wait until after she's married and push our ideal date out? What is the proper procedure here??