Prosecutors argued the 25-year-old was jealous of the attention her 18-year-old sister and her newborn were getting, but the ...

Sibling rivalry isn’t just for humans, as proven by this viral video of a rescue pup named Cactus and his feline brother, ...

"We saw no remorse whatsoever, no guilt, no apprehension,” police said. "Never seen something like this." The post 'You don't ...

The row starts over a battered blue cup. Two children, both sure they saw it first, both certain the other one is cheating ...

Nobody knows how to get under your skin quite like a sibling does. For many, these squabbles typically never amount to ...

The other son has never married, has no children, owns his own condo, and has a good-paying job and spends all of it on ...

But for twins Emily and Abigail Roper, sibling rivalry and their fair share of bickering have been a healthy driving force ...