Imo, it depends upon the relationship-style that you have with your family and how open-minded they are.

If you're pretty close, and you all openly care about one another, go for it! If it's a rocky relationship and/or stressful, I'd advise you to seriously think about it first. Write up a chart of positives/negatives of telling and not telling. From there, you ought to know what you onestly feel the right thing for you to do is.

Very best wishes sent your way!