How do I tell my dad and grandmother I am expecting?

Kelseyy • Wife💍! Mother 05.07.16 & 01.12.20 👶🏽🎀
The most important person know that I am which is my mother and she is fine about it. But how would you all tell your dad or grandmother knowing that they are gonna be mean an negative about it! I know they will be this way because they are VERY JUDGMENTAL people. By the way im 21 and even tho im grwn that wont make any difference!