At least once a month this happens

My partner takes forever to pay for childcare. At the end of the month it is the worst because I cannot cover his half. Sometimes the baby sitter will message me and remind me to pay and I feel embarrassed. This time around I'm waiting on him again.

What do I message her? The truth or what? I don't like the world to know my business but I don't want to leave her hanging. What would you do?

Also we spoke about it earlier and he said on his break he would sort it out. I've heard nothing.