break in(to) tears
To suddenly begin to cry. My mother was fine this morning, but she broke into tears at the funeral.
break out in(to) tears
To suddenly begin to cry. My mother was fine this morning, but she broke out in tears at the funeral.
break out in(to) tears and break in(to) tears
to start crying suddenly. I was so sad that I broke out into tears. I always break into tears at a funeral.