DH is a Maths tutor - he used to be head of maths, SLT and education lead or something.
His waiting list is 2 years, he is inundated with enquiries and he has a strong local reputation.
He tutors from primary to A Level.
We had friends who we met through a mutual hobby. That hobby event was a one-off so we never see them due to the hobby but the shared interest and having a bit in common meant we became friends. They’re a few years older but had their daughter when they were 15. As a result, they’re not too dissimilar in age etc.
At one point, when socialising, DH spoke with their DD about maths as she was doing her GCSEs and DH noticed she was behind and would be on foundation. Mum didn’t realise (they also want their kids to be academically successful as they weren’t and they are now very wealthy business owners) and asked DH to tutor. He did at a discounted rate and she did her best in that GCSE - DH got her from a 3/4 to a 7 in a year.
Since, our friendship has fragmented. I have no idea why, she just ghosted me one day. She has to speak to DH due to tutoring but became more stand off with him. He is now tutoring the DD for Maths A Level at the same discounted rate. He is honouring it. Today he got a message from Mum because school have said she’s not performing as well in A Level Maths. This isn’t a surprise as she only got a 7 and was warned. She also isn’t working as hard as needed as she is doing all her teenage things (hobbies, job, driving).
Mum has said “you need to stay on top of this” but this isn’t his job? He is aware of where she’s at. He can only do so much.
She also pays weeks late (money definitely not an issue) and isn’t particularly nice even for someone who isn’t a friend.
How would you handle this?