Sinead and Jeanette trained as nurses at St Vincent's Hospital, where they both worked for several years.

Sinead also worked in sales in an aesthetic medical company, and completed a higher diploma in wound management and tissue viability. She got married to Fergal Costello last September, and they live in Naas.

Jeanette is from Rialto, and is the former nurse manager of a Dublin cosmetic surgery practice. She left there to pursue a career in medical sales. Jeanette lives in Kilnamanagh, and has been married to John Browne for three years.

Last June, Jeanette and Sinead opened the Renew Aesthetic Clinic, on Convent Close, off Baggot Street, which specialises in colonic hydrotherapy, facial fillers such as Botox and Restylane, microdermabrasion, endermologie and gycolic facial peels.

Jeanette on Sinead

I noticed Sinead on our first day in Vincent's in 1994, because we had to live-in for the first year back then. We were all sitting in the big common room with our parents, and they were processing us in alphabetical order, when suddenly Sinead was brought through ahead of us. We thought she must be somebody very important, but it turned out that her mum had passed away several years before, and her dad was extremely busy and had just about been able to take the time off work.

There was a big queue ahead of them, and he couldn't wait around too long, but had really wanted to meet the matron and staff, so they let them go first. It's nerve-wracking enough on your first day, and poor Sinead was mortified at being rushed ahead like that.

Sinead is very loyal and loving, and she's such a positive person. Her glass is always half full. We had rooms on the same corridor that first year, and had great fun. It was quite strict; we had to be in at 11pm if you were working the next day. You could get a late pass until 2.30am if you weren't. There were times when we'd be sneaking in from clubs at 4am at weekends, and trying to get away with not signing our names in the porter's book in the hall, because we'd get into trouble for being late.

I remember once when we had a late night, and college started at 9am.

Sinead and I were wrecked going into class, and we put our heads down on the desk for a snooze, shielded by the girls in front. Unfortunately, a helicopter landed in front of the hospital, and everyone got up to go to the window to see what was going on, leaving us asleep and visible for all to see. We awoke to the sound of everyone laughing, apart from the tutor who was not impressed. We had a great group of friends in class, and there are still six of us who are really close and meet up to this day.

It's been fantastic working together.

Sinead is a great 'people' person, which is ideal for the business we're in.

Everyone is just drawn to her the whole time; they really warm to her. They tell her everything, as I do myself, because if you have a problem, Sinead would be happy to sit there all day long and talk to you about it. She's really encouraging and thoughtful, and loves to be around people. We spend a huge amount of time together, and also go out and socialise after work. Our husbands get along really well, and the four of us would go off to matches together.

Sinead on Jeanette

I was mortified on my first day in college because skipping the queue was my introduction to my 50 classmates.

We all got on really well though, and Jeanette and I went away for a week to Corfu after a couple of months with a group of our classmates. We had a wild time, and really knew each other by the time we came back.

Jeanette and I wanted to start up a business together, and we were thinking of starting up a nursing recruitment agency. We did a 'Start Your Own Business' course about seven years ago, and started planning our agency, but we concluded that it would be too difficult to do. We even toyed with the idea of a drive-through launderette on somewhere like the Stillorgan dual carriageway at one point. We decided on opening Renew, because with Jeanette's work experience in that area, and having both worked as nurses and in aesthetic medical companies, we were interested in the whole area of non-surgical cosmetic procedures. It opened last June, and we're delighted at how well it's gone so far.

Jeanette is really practical . . . she's better with money and accounts and doesn't let me have the cheque book!

She's also very organised, and is great for developing ideas. She's a very deep thinker, but is really fun-loving as well. I think we're very lucky because we never fall out, and if one of us is having a low day, the other will stay positive and encouraging. Jeanette specialises in the injectable treatments, and I'm qualified in colonic hydrotherapy, but we cross over and do everything. Her experience in working in a cosmetic surgery company was a great help to us initially.

I had such a busy year last year because I got married, and moved house and we opened the business, and Jeanette was a huge support to me through it all. She knows exactly when to bring me out for lunch to cheer me up.

We always have a laugh together. I remember one occasion when we decided to get a personal trainer to get us into shape. When the girl arrived for our first training session, we both nearly died, because she was a babe who had just spent a week in Spain. She arrived looking blonde and bronzed in her little belly top and tight jogging pants, while Jeanette and I were covered from head to toe in baggy tshirts and track-suit bottoms. It was so embarrassing walking down the road, as every man turned to look at her. . . so we decided never again!