I can't imagine working with my siblings would be easy: you don't know my siblings. In a professional capacity, I've co-operated and collaborated with them a couple of times, but to work with them? Everyday? Rewarding and easy in some ways, yes; the understanding, the knowing - of how social and cultural experiences will be useful here, or a hinderance there - but I think I'd find it difficult - difficult to start, and difficult to quit.I put the question to myself having met the Mc Ginn sisters recently; three siblings and serial entrepreneurs embarking on their third start-up, OPSH.COM - 'The third way to shop' The catchy name hints at the disruptive potential in OPSH - reversed, back to front, inside out, then nudge on a syllable to opt-ion....and you see where we're going.Prowlster & What Will I Wear Today were the sisters' first two start-ups; it's fair to say fashion is a theme with Jennie, Sarah & Grace, but this isn't three women who are keen on fashion so they're launching a website; it's immediately obvious they have immersed themselves in an industry to understand the market, trends, technology and critically, their (soon-to-be) customers. Fashionable women yes, but they know the fashion business: back-to-front and inside-out.Subscribe on SoundCloud or on iTunes: https://itunes.apple.com/ie/podcast/redcert/id815220087?mt=2