Babies name was SUPPOSED to be a surprise

LuEll
Please read. Mom ruined it. I need opinions. So before we found out it was a girl we picked a name and didn't tell anyone. We decided to keep it like that. I was excited that I got a onesie with her name on it so of course I told my mom. She was staying with us so I told her not to snoop. She went home to Cali (I live in Ohio) and now she came back since I'm almost due. I'm a terrible liar so when she asked if the onesie was in the diaper bag I said yeah. Can I trust that you won't go looking? She said absolutely I don't want to ruin it. Days go by and SO she went a few hours away to visit family yesterday. She texts me and says "Doug (her cousin) says you should name her [_____]". Oh so conveniently Doug hasn't suggested ANY names EXCEPT the one we actually picked 😡😡😡😡. I go pick her up today. Do i say anything? I hardly slept last night. I didn't think she would do that and IF she did I didn't think she would tell me. She knows I didn't want anyone to know 😡😠😟😞😖😔