We have a dysfunctional family. I have a little half brother 18 years younger than me, he is 19. I am married with kids. When mum divorced little bro's dad he went to live with his dad and didn't see my mum for a couple of years as he blamed her as she had an affair. Bro's dad didn't help by telling him all the sordid details. Not excusing her affair but her husband was emotionally abusive, I witnessed it many times and was relieved when she left him. Mum is desperate for a relationship with bro, but when they are together she annoys him and he seems to punish her by ignoring her regularly.
Anyway, we have got together with mum a handful of times but the two are always sniping at each other. They are both overly sensitive and take everything the other says the wrong way. At the moment little bro is ignoring mum again. Yes mum should be the adult, but little bro does seem to want to punish her too.
My relationship with little bro suffered as usually he would cut me off whenever he cut mum off, he ignored the birth of my child, he never says happy birthday to me or seems interested in my life. But then my life probably isn't very interesting to a 19 year old boy. I have invited him to family events but he always declines.
The last time we got together at mums (before he started ignoring her again) the two were weird, like competing for my attention. Bro would talk to me and mum would interrupt and vice versa, mum relished in telling him how we had been out for an evening and bro responded by asking me to go out with him, they were like two little kids fighting for attention.
Bro messaged me asking me to go out with him tomorrow night, normally he has cancelled by now but so far hasn't. I do feel he only wants to see me to wind mum up, and it's a massive headache arranging getting to and from his town to meet, arranging childcare, DH works til late so will need babysitter until he returns and he is irritated that I won't be here when he gets back and at the expense of the babysitter and travel. Bro won't come here as wants to go to his local pub with me and have a proper night out (possibly to rub into mums face).
It feels alot of effort for someone who has put no effort into being part of my life and drops me for no reason regularly, but then he is just a kid. I don't want to go, it will be full of young people and puts DH out and is costly. But then if I cancel he might not reach out again...
So wibu to cancel or should I go?