Does a husband's intercourse with his unwilling wife, while she is fasting to expiate accidental killing, invalidate the continuity of her fasting and require her to restart anew, or is she only obliged to make up for the day she spoiled?

This question has been answered previously. The continuity of the fasting was broken by intentionally eating out of laxity, not by sexual intercourse. She was obliged to ask people of knowledge before proceeding to eat. She must repeat fasting for two consecutive months.