The boys, aged 23 months and 10 years, were in a car with their mother when the crash happened.
Discussions have taken place in London ahead of a third vote on the PM's Brexit agreement next week.
The UK may not now leave the EU on 29 March, if EU member states agree to grant a delay.
Republican rebels backed a measure revoking the president's emergency declaration.
Charlie Whiting, the head of Formula 1 for governing body the FIA and one of the most influential people in the sport for decades, dies aged 66.
The PM's deal was overwhelmingly rejected on Tuesday - now MPs will have their say on a no-deal exit.