Announcement help- telling my dad

Breanna • little man born 02/2019 💙

So I just found out I’m pregnant and I wanted to tell my dad on Father’s Day. I thought for some reason I would need help with a fun surprise for him, so I told my mom, but now I’m not sure how to involve her, and I’m feeling guilty for not letting her be part of the surprise. (I made it special for her, don’t worry, but I wonder if I should have just told them together.) does anyone have any ideas on how I could involve her in revealing it to my dad? We played with the idea of her giving my husband a Father’s Day card at dinner.