Ah, consequences ...
£400 tattoo = no bedlinen or nappies.
I would not have been able to resist mentioning that, but, as I've previously said, I can be petty...
Of course you gave him nappies and lent him some bedlinen, your twins can't have one nappy for a weekend. And your kids can't sleep on bare mattresses.
But add the cost on to what he owes you ...
I'd document it via email:
"I will add the cost for the nappies I had to give you this morning to what you already owe me, which is as follows:
mattresses £x
utilities £x
nappies £x
Please wash and return on Sunday afternoon the bedlinen I had to lend you.
Please also ensure that you are on time for future pickups as it was very upsetting this morning, for our son especially. "
And he can wash the bedlinen Sunday morning ready to return to you Sunday afternoon.
I don't think any of us are surprised that he was so late this morning. Your poor son, awful start to his weekend with Dad.
💐