Karate is so 80's

I had a call last night from my sons mum telling me he is starting Karate lessons soon. I was dreading it being in time I usually had him and that she was going to say I'd see him less. But his lessons are a day I don't see him although I heard her theme tune down the phone.."can you get him to bed earlier because everything he's been at yours he's knackered". 

I was also told that his name is down for swimming lessons and thus may encroach on my end time with him at the weekends. Upon after thought, I've realised I could offer to take him there and in effect have him longer. Plus swimming won't be forever and neither will karate. Karate is so 80's. 

I did get asked to help towards buying kit etc and that's not a problem. I think taking your kids to clubs is a huge part of parenting. It's often against your will too but it's time with them. I quite relish the idea of sharing these interest with him and so If I take him it will be remembered as our time. I freaked out a little bit initially when I thought "I knew he would one day put hobbies and friends ahead of me but not as soon as he was 5". 

I think embracing it is the answer.