The family of Jane Richard and the late 8-year-old Martin Richard said Thursday she already is dancing on her prosthetic leg and "struts around on it with great pride."
"While we have made progress with our physical injuries, the emotional pain seems every bit as new as it was four months ago," the Richard family said in a statement Thursday.
Parents Bill and Denise Richard also were hurt in the attack April 15, when two shrapnel-loaded pressure cookers exploded near the marathon's finish line, killing three people and injuring about 260 others. Denise Richard lost sight in one eye, and Bill Richard suffered hearing loss. Their 11-year-old son, Henry Richard, was uninjured.
Authorities say two ethnic Chechen brothers from Russia living in the Boston area orchestrated the attack. Dzhokhar Tsarnaev, 20, has pleaded not guilty. His older brother Tamerlan Tsarnaev, 26, died following a gunbattle with police three days after the bombings.
The Richards say they're still coping with the agony of losing Martin "and the senseless way it came about."
"The pain is constant, and even the sweetest moments can become heartbreaking when we are struck by the realization that, 'Martin would have loved this,'" they said in their statement.
Jane came home from a rehab hospital a few weeks ago. That night, the family slept together at their home in the city's Dorchester neighborhood for the first time since Martin's death. They'd been determined none of them would sleep in their own beds "until all of us could do so."
The Richards said Henry and Jane return to school in a few weeks and the family will begin exploring a "meaningful and impactful way" to honor Martin's memory.
Copyright 2013 The Associated Press.