Sasha Alexander Shares Her Rule for Sibling Squabbles

Sasha Alexander is soaking up the sibling bond between her two children.

“It’s really fun to watch the kids interact and fight and just provoke each other,” the Rizzoli & Isles star tells PEOPLE. “There’s a whole dynamic there that I’m sort of glad I didn’t have — but it’s really fun to watch as a parent!”

In an effort to keep the peace between her kids — Lucia Sofia, 7, and Leonardo Fortunato, 2½ — the actress is enforcing a new household rule that she hopes will deter her daughter from pushing her baby brother’s buttons.