Any single moms feel guilty because it feels like your keeping your kid from their dad even though you know your not?

Example: yesterday was Alice's birthday so we went to the aquarium in the morning. Her dad text me when we were halfway through asking what we were up to. When I told him he goes "aw man I wanted to come!" and all I could say was "well why didn't you tell me you wanted to come?". I know that's not my fault but I still feel bad ugh