I dunno Kizzy - if you're close, and after years of you drinking, and then 7 months avoiding them, do you think they know or have pieced something together already?
For me I just told my family the truth.
Some refused to believe it, others didn't get it, and kept on offering me 'just one' or shandies or whatever...but I held fast and eventually they came around.
They saw I was happier sober, and while they might not have understood why I stop drinking they responded to me being happy.
I reckon your family will be the same, after a little adjustment
D