announcing pregnancy

When did you tell your parents/siblings you were pregnant? We are waiting 13 weeks until we share publicly but my husband and I are both super close with our families. We are eager to tell our parents. We currently live with my parents as we are building a home and not able to move in until the 30th. So we are around them daily. We want to wait after our 8 wk appointment but we think it's going to be hard to keep it a secret as we see my parents daily and his almost weekly. We were thinking of telling them the 24th which would put us at 4 weeks.