The couple from Lochwinnoch have been involved with the organisation that provides training assistance dogs to people with disabilities for three years, and every few months they bring their local puppy training class to the busy airport to let the dogs get used to the noisy environment.
As harassed travellers rush from check-in desk to departures, one dog is learning how to press the button to open the lift door, while another sits patiently by the clamour of the baggage reclaim belt.
In Tesco, a dog carefully picks up a tin of soup off the shelves with its mouth and places it in a shopping basket and outside, another crosses the road, between bursts of traffic.
In a few months this will all be in a day's work for the pups.
They might have beautifully brushed coats and impeccable manners, but these are no pampered pooches: they are going through a rigorous training programme that will help disabled people live a more independent life.
"Canine Partners need people to be puppy parents - you have a dog from eight weeks to 18 months old and take it from the very basics, walking to heel and learning its name, to retrieving things and tasks that will help someone out of a chair and even empty the washing machine," explains Wilma.
"We agreed at first to be foster parents, to look after a dog when the puppy parent was away, because I just didn't think I could look after a dog all that time and then have to part with it.
"The first dog we got was Xylo. He was six-months-old and it ended up we had him until he was 20 months.
"He stayed with us all that time but he wasn't a pet, he was a working dog. We would go to training class once a week, then work with him at home.
"When it was time for him to go we had to take him to Carlisle to meet a woman from Canine Partners' head office in West Sussex. We handed him over, then went for a cup of tea and just cried and cried. It was heartbreaking."
At the moment the couple are foster parents to Ocean, who is getting used to the hectic foot traffic around the check-in desks.
Nearby is another Wilma, a particularly cute 12-week-old puppy who is charming a small crowd of admirers.
"After Xylo we only went for six days without a dog, then we got Emmett for nearly a year," says Steven.
"We're happy fostering at the moment. That can be anything from an hour to a day to a week to a month."
Between them, the couple have raised £25,000 for Canine Partners. The charity depends entirely on donations and receives no financial help from the Government.
When Wilma isn't manning a stand for the charity by the entrance to departures on her day off, she is organising fundraising nights and events in the local area.
"The airport and all the staff have been really supportive," says Steven. "We have won volunteer awards for our charity work."
Such dedication to Canine Partners is difficult enough to maintain for any couple with busy jobs and lives.
Wilma suffers from myotonic dystrophy, a chronic, slowly progressing disease which affects her muscles and heart.
"I suppose that's one of the reasons I'm involved in this," admits Wilma. "It takes my mind off what's wrong with me and lets me focus on the dogs."
THE more volunteers who become puppy parents, the more people the charity can help.
Recruiting volunteers to work with puppy satellite supervisor Bryony White is another task for Wilma and Steven, as is liaising with the charity's Scottish fundraiser, Dale Gormley.
It costs abut £20,000 to pay for a canine partner, from starting training at eight weeks to retirement at the age of 12.
The charity places about 60 dogs a year with injured servicemen and women, veterans and civilians with disabilities, many suffering from multiple sclerosis.
Ocean and little Wilma are two of 120 puppies in training at any one time, and when they qualify they will help with everyday tasks such as opening and shutting doors, unloading the washing machine, picking up dropped items, pressing buttons and switches and getting help in an emergency.
"The dogs are just incredible," says Wilma.
"We get so attached to them but feel very proud when they head off to be partnered. At the end of the day, that's their job and they do it incredibly well. It's wonderful to be a part of it all."
l Visit www.caninepartners.org.uk.