It's good for families to talk about college. But be mindful of what you actually talk about when the subject comes up.
If your family often talks about what an exciting time this is, how many great colleges there are, how much your student is doing right, and what an amazing four years your son or daughter is almost certain to have at whatever college is lucky enough to be the one, the conversations will probably make your family feel pretty good.
But all your family talks about are perceived SAT score deficiencies and whether or not a tutor might help eek out an A in trig, if you constantly compare your student to other students and worry about how you'll address his or her weaknesses, if you talk incessantly about whether or not Stanford or Princeton or Georgetown will say yes, your conversations are going to make everyone in the family feel bad.
If all your talk about college just makes the family even more stressed, you don't have to change the subject. You just have to change what you're saying about it.