Basically me and my DP have been together for 10 years, we have 2 children together and we have finally decided to get married in summer of this year. DP's sister has been with her partner for just over the same amount of time, they also have children and have always said they would never get married/shown little interest. Two weeks ago we announced our wedding plans and all of a sudden it is plastered all over facebook (we rang everybody up to let them know personally) that they are also getting wed (in approx. 2 years time so a while off yet) and are soooo excited blah bah. Every status update since yesterday has been about their 'imminent wedding' am I being unreasonable to think it is a huuuge coincidence? Not sure if I'm reading too much into it and need some perspective.