My first two daughters are twins, too. They are 11 now. Wasn’t too bad in the first year. All those endorphines made it pretty easy and they slept pretty well. Terror came a year later, endorphines waned and their sleep got worse. For two years it was a living nightmare. Still got on my bike regularily though. Wife wanted a third one. This turned out to be super easy relaxed. And I got back to proper bike racing.