Itachi pretty much collapsed into the wheelchair, completely and utterly spent. (Sasuke barely had enough time to move the groceries out of the way.)

"Sorry, Sasuke..." he whispered as he tried to catch his breath. That answered one question right there. "I thought I'd... walk across the street... stretch my legs a little. Things got... complicated after that."

The way he spoke was strangely forgiving. There was no hint of malice toward the woman who basically tried to kill him with no provocation other than sight alone.