Don't think this is something that will happen to you, it just jogged a very old memory or maybe I should say nightmare.
 
Years ago when our first grandchild was  born, we had a spoiled Persian cat.  Well, he didn't like not being number one and took to peeing on our new leather couch.   It seems sort of funny now but it was the most frustrating animal experience I ever had.  It actually had me in tears most of the time. 
Thankfully our little Yorkie loves the kids & just wants to play with them.  When the second child came, the first got where he had to sit in my lap whenever I held the second, and now Little Bit has to sit there along with the two kids.