I have name changed for this and changed a few details in case it is identifying.
This isn't an AIBU more of a WWYD.
Bit of background. XH and I have a DD together. We had an amicable split and co parent together, he has DD EOW and one night in the week. He pays regular maintenance, we have a private arrangement not through the CMS and never had any problems, he always pays on time and he pays more than the minimum required.
XH had a bit of a difficult upbringing - never met his father and mother died young of liver failure due to alcoholism. He has done very well for himself despite his background and leaving education at 16, he moved to a city for better job opportunities and is now a higher rate tax payer.
In contrast his younger brother has not done so well. He is a nice guy but doesn't have much drive - works in a minimum wage job and isn't interested in looking for anything better. The brother has 2 children with his partner who cannot work due to disability. XH of course feels a sense of responsibility and helps his brother out financially, pays his phone contract etc.
The brother has just found out that the place he works is shutting down at the end of the summer and he will be out of a job. He lives in a small town where job prospects are limited and is struggling to find something else.
XH has come to me and asked if he can skip paying me maintenance for this month so he can help his brother out.
On the one hand I can go a month without maintenance. I have a good job myself and can pay for everything without XH's money. I have been on the breadline before and I know how horrible it must be for his brother and family. However on the other hand he does have financial responsibility for his DD and I'm worried that if I let him off for this month it may turn into another month and another as I don't know how long it will take for his brother to find work.
If you were in my situation WWYD?