Mick Philpott has admitted hitting a previous girlfriend, but says she deserved it because he claims she hit his children.
Prosecutor Richard Latham claimed Philpott hit his mistress, Lisa Willis, with a stick.
Philpott says he "can't recollect" whether he did or not.
More top news
MI5 face mounting pressure over claims the IS executioner 'Jihadi John', named yesterday as a London graduate, was known to them
Labour leader Ed Miliband is due to set out his party's plans on how it would cut tuition fees.
New drug driving laws are to come into effect next week, including laws on some prescribed medications.