You definitely need time to devote to your work, there's no doubt about it. You could even end up doing some unexpected overtime for the next day or so, thanks to someone else's willingness to blow off their own workload. You're also feeling the longing: and it's a strong one: to be alone, even if it's just for a little while. Well, that's what evenings are all about. You may have to wait until later in the week to get the solo time you crave, but it's on its way.