What a rollercoaster ride!
I have twins also. (Irish? I don't understand that though?) Anyway, they graduated three years ago. My third (?) child, graduated last year (thank goodness). That year was different for all three. What I have noticed is that each one has "arrived" at a point where it is important to them at a different time. I have tried demanding, begging, threatening, withholding, ignoring, therapy, etc. Different things work for different kids but not at the same point-----twins or not.
I had finally begun to relax and feel like everything was going smoothly. Then....this past Saturday the 18 year old crashed his car delivering pizzas. No bad enough? Ok. The next night my 21 year old daughter totaled her car!!!!!! I am thankful---yes. Fortunately no one was hurt.
Never, say never. Your kid will stay up all night, will drink beer like it is water, will sleep in all day, will miss class.....even the "good ones". They will learn----maybe even visit the old "dean's warning list".....They will learn.....they will learn....they will learn....growing up. I sure miss the days when potty training was my biggest challenge!