yeah, it's part of a short textless series which involved the marisa's family pooping all over it, marisa gets mad and shoves its sister off the table.
Yeah the marisa shoved it's sister off and because of that got smashed.
But i would like to add that i think both the "shoving" story and the "shitting" story may be 2 different beasts, if they were the same, the Marisa would had looked more dirty while shoving her sister off the table.