Yes, many women will use the "abuse" cry to their advantage where there was no abuse. Like I said, nothing you described sounds remotely like abuse. I was just trying to see if SHE had some underlying reason (like being abused in childhood) that would make her more sensitive to normal conflict, or if you can be a grumpy guy (again, not abuse, but someone very sensitive might react to a critical grumpy person ). My boyfriend for example has Obsessive Compulsive Personality Disorder and when he's in a snit about something that's not right in the order of his universe he can be grouchy and irritable. Doesn't phase me but someone with a history of abuse might be triggered by it.
And I agree that you should NOT do anything that looks like an admission of guilt. Heck, I would have pulled over and grabbed my kid's leg too and said stop kicking your sister.
