It’s a little surreal that I have to pay knowing my daughter is old enough to take out a mortgage

Phones the csa on the 2/1/13 to ask about my last payment of maintanance, daughter 19 on 04/01/13. Told that i would now have to pay until she is 20. They didn’t let me know of the change,which apparently happened in Dec 2012.

Paid Decembers maintanance as usual now found out i have another £4000 to go.Im glad my daughter is furthering her education, but it is a little sureal as i am giving her mum that money, then on the other hand knowing my daughter is old enough to drink, vote and take out a mortgage. Confused