Damn, I don't even have kids and that sounds.......damn. But I guess it applies to regrets one might have around any big loss in your life. I regret every single time I got impatient or snappy with my mother, every time I rolled my eyes when my back was turned to her if she asked for a cup of tea. Y'know, make your mum a cup of tea, it's the least she deserves from you, you absolute prick. I mean I always did but sometimes, internally, I was sighing and whining because I wanted to go do something else and it was delaying me.
I haven't seen this film yet, surprise surprise. I knew I wasn't going to get an opportunity so I just said screw it and looked at all spoilers, watched clips etc. I can see myself tiring of Deadpool himself but, from what I watched, Jackman gives another masterclass and seems to have some great stuff to work with - such as the scene you're talking about explaining why he now wears the costume - what a brilliant way of staying consistent with the Logan/Wolverine Jackman has been playing for over 2 decades while finally giving fans what they still really really wanted to see.