Speaking to Extra at the Met Gala on Monday night (via TMZ Sports), Brady said he chose to use the time to visit with his mother.
"It was to spend time with my mom," Brady said. "... And you know, that's pretty important to me. It's been a great year, but it's even better to spend time with my parents, and my kids. And I can't wait to get that ring. That's what I'm really looking for, that ring ceremony in a couple of months."
During a radio appearance on WEEI the Monday after the Super Bowl (via Bernie Augustine of the New York Daily News), Brady said his mother's prognosis "is good and she's not quite through it but hopefully there was some healing energy from last night."
Brady announced on the morning of the Patriots' visit to the White House on April 19 he would not be attending due to "personal family matters."
The Patriots have won five Super Bowl titles since 2001 with Brady at quarterback. He was named MVP of New England's historic 25-point comeback over the Falcons with 466 passing yards and two touchdowns.