Keita Mullen, 30, died after she and another pedestrian were hit by a car in Bawtry, which failed to stop at the scene.
The collision happened on the A638 High Street shortly after midnight from Saturday to Sunday, last weekend.
Emergency services were present, but despite the best efforts of paramedics, Keita was pronounced dead at the scene.
Her family is supported by specially trained officers as they try to cope with the tragedy.
The second pedestrian also affected in the collision, a 33-year-old woman, was taken to hospital with minor injuries.
A 49-year-old woman has since been arrested on suspicion of causing death by dangerous driving.
She was released under investigation.
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Police believe the car involved was a Nissan Juke, which was driving along the High Street towards the Great North Road at the time.
Keita was the owner of Beau Balloons in Worksop and as a tribute, a balloon release is planned in the town at 4pm on Sunday.
It will be held on St Johns Field, Raymoth Lane, near the Three Legged Stool pub.
He described her as “beautiful inside and out, so talented and the best mom in the world”.
Keita’s cousin, Richard Rimmington, is among those who posted about the tragedy online.
He said, “RIP little cousin. There are simply no words. Please if anyone knows anything about the driver or whereabouts of the car mentioned. Please report it. »
Among the tributes to Keita posted online is one from Nasim Beamish, who said: “I can’t believe she was so adorable and my baby shower decoration is such a waste. tragic for no reason.”
Maxine Saul added: “She was such a lovely, kind woman.”
Nicole Craven-Davies added: “I still can’t believe it, Keita, you were such a beautiful, caring and kind woman. I’m so sorry, it’s just tragic. I send my love and strength to her family and her three little ones.
Laura Jones added: “I can’t believe what I’m reading.
“I’ve followed Keita on Instagram for years. I’ve followed her through her beautiful marriage and her pregnancies.
“I immediately recognized his name and his face and I’m in absolute shock.
“She was a beautiful, amazing woman. I just can’t believe it.
“She had everything to live for, I’m so sorry Keita.”
Sarah Scarlett Harley said she was “heartbroken” by Keita’s death and described it as “incredible”.
Nicola Law added: “Absolutely sorry for all of you, words cannot express what you must all be going through at this time. Was a lovely woman, talented beyond words, she will be dearly missed by all she touched. She will be greatly missed.