She says it was the husband who hit her, but actually it was the other way around.

Literal

Husband [topic-は] [direction-の方が] hit [quotative-と] she [topic-は] is-saying [but-が], actually that reverse was.

~の方が殴った = 'it was the husband's side that hit.' 実はその逆 = 'actually the reverse.' A sentence about disputed accounts of domestic conflict.