It takes two to tango.
It’s better to be safe than sorry.
In the doghouse
If you play with fire, you’ll get burned.
In the red (In the black)
It’s no use crying over spilt milk.
If wishes were horses, beggars would ride.
If the mountain won’t come to Muhammad, Muhammad must go to the mountain.
It’s never too late to mend.
In the heat of the moment