Michelle Jennings, 35, died in a crash while travelling in a private hire vehicle in East Lancashire, on Wednesday, leaving a husband and two children, aged five and seven.
It has now been revealed that the driver is still fighting for his life in hospital.
A report in the Liverpool Echo has confirmed that driver, Dave Sherwin, broke his neck and ribs, ruptured his spleen and suffered multiple bleeds on the brain.
Giving public updates on Facebook Mr Sherwin's heartbroken brother Ian, said: "My brother is in a very serious condition and I honestly don't know if this is going to end well, if at all."
He added: "Today we were told that he is very unlikely to survive or if by some small miracle he does, he will not be the person, brother, uncle, father or husband that we once knew!".
"Cherish your own family with all that you have, because life can be so cruel!"
Mr Sherwin also urged drivers to slow down to prevent more tragedies.
He said: "Don't let such a tragic event have to happen, in order for you to change the way you drive.
"Slow down, be careful and considerate, put your phone away and on silent.
"Put your seatbelt on and don't drive while under the influence!
"If you do this already then great, if you don't, stop now before you have to potentially live with the consequences for the rest of your life!"
Mr Sherwin added: "How do you make sense of it all?
"They are saying how grim that the situation is, but our kid just appears to be lying there asleep, just wake him up and he will be back on his feet in no time, right?
"If it was only that simple.
"I've always thought that he was made of sterner stuff than me, hard as nails, tough as old boots, rarely gets ill and even when he did, didn't have time for doctors or nurses, just got on with it.
"This makes me think or hope, as others who know him have said, if he has any type of subconscious sense of what is going on or ability to fight his condition, he will with every last breath.
"This may seem as some wishful thinking or naivety, but we have to remain as positive as we can, as miracles do and have happened in situations like this before.
"Our deepest sympathies are also with Michelle's family, who must have suffered unbearable pain in this needless tragedy.
"I sincerely hope that they eventually find peace and are able to continue with their lives, in some shape or form. Xxx "
A 26 year-old man from St Helens, was arrested on suspicion of causing death by dangerous driving and causing serious injury by dangerous driving. He has been released on bail.
Two fundraising pages have now been launched on sites JustGiving and GoFundMe, with a combined total of more than £16,000.