His upcoming birth had spurred the 29-year-old into quitting her habit.
And she says now: "As soon as I saw him I thought it was well worth it."
Kelly, from Kelvinside, has been smoke-free since early in her pregnancy with the help of an NHS smoking cessation worker who gave her one-to-one support, a service which is on offer across Glasgow and Lanarkshire.
She decided she wanted to stop smoking as soon as she found out she was pregnant, and initially used a nicotine inhalator to help.
Kelly, whose partner is Ronnie, 29, said: "My smoking cessation person, Jo, supported me every week. I phoned her a couple of times when I felt like I wanted to have one, and she made it easier.
"The hardest thing was going out with friends who were smokers, but that's when I would have my inhalator.
"I would tell people to give it a shot too."
Kelly knows she did the right thing: smoking is the biggest preventable cause of miscarriage and infant death. Almost 8% of miscarriages are attributable to smoking, and lighting up while pregnant increases the risk of sudden infant death by up to five times.
NHS Greater Glasgow and Clyde and Lanarkshire both run Smokefree Pregnancy Services which offer tailored advice and support to help mums-to-be give up the habit.
But, as reported in the Evening Times, many don't take up the offer.
Despite the warnings, nearly one-fifth of women smoke while pregnant in the NHSGGC area, with the same high number also lighting up in Lanarkshire.
Glasgow has set a target of reducing the number of mums-to-be who continue to light up by 7%, while Lanarkshire also wants to drive down figures.
In Glasgow alone that could save the lives of 13 babies every year and reduce the number of infants born with a low birth weight by almost 200.
Low birth weight can raise the risk of heart disease, diabetes and obesity in later life. Other risks include premature birth and its associated problems.
The total annual costs to the NHS of smoking during pregnancy is estimated to range between £8.1 million and £64m for treating the resulting problems for mothers, and between £12m and £23.5m for treating babies.
Almost 30% of mothers- to-be in Scotland's poorest communities smoke.
At their initial antenatal visit, all pregnant women are given a carbon-monoxide test. If their levels indicates they are a smoker or are exposed to second-hand smoke, they're referred to a specialist stop-smoking adviser for pregnancy.
Community midwife Cathy Murphy, 57, from Uddingston, has been working with mums-to-be in Lanarkshire for 20 years.
She said: "At that first visit we'll ask them about their smoking habits.
"In Lanarkshire we're going to start an opt-out clause so every smoker will be offered help and she has to opt out of that if she doesn't want to.
"With a lot of them, there's a lot of shame and guilt.
"It's notoriously hard to give up. We know that.
"The blood vessels going to the placenta constrict with every puff. That means they decrease the amount of oxygen the baby is getting, which is not good."
Another mum-to-be, Michelle Lockard from Johnstone, says she always thought that as soon as she fell pregnant she'd stub out her smoking habit.
But after discovering that she and husband Robert, 27, are going to have a baby in June, the 28-year old found it wasn't that simple.
She needed professional help to give up cigarettes – but now, at 30 weeks pregnant, she's thrilled to have been smoke-free for three months.
Michelle said: "I always said I would stop when I got pregnant but it wasn't as easy as that.
"When I found out I was pregnant I told the doctor and he referred me to the smoking cessation service for pregnant women at the Royal Alexandra Hospital in Paisley.
"I saw a lady named Joanne and she was behind me all the way."
Of course, giving up an addictive habit at a stressful time is even more difficult, and it took Michelle more than one attempt to finally make the break.
The employability trainer, who had been smoking since she was just 12, said: "There were days when I was crying, nipping to the shop at six in the morning in my jammies for cigarettes as soon as my husband went to work.
"But these services are out there and they really helped me."
n For more information, call Smokefree on 0800 022 4332 or the NHS Pregnancy Smoking Helpline on 0800 169 9169