No second line has come to me.  I have no desire to find one.  
I thought about going back to writing YAs.  My agent has suggested it and so have friends.  I’ve published 5.  But the thing is that would require writing. 
I did have a heady moment when I thought it would be okay to write one with another person.  And then the idea deflated like a sick balloon. 
Since then (about a week ago)  I’ve felt hostile toward the act of writing. 
Worse than that is that I can’t read. I start something and then I put it down. I’ve had periods like this before but somehow this one is making me mad. Everything is making me mad.