Who is Lester Lamb from Cloudstreet and what is their importance?

Lester Lamb is Oriel's husband and the brains behind the idea of opening a grocery store. Oriel, of course, takes over the opening of the shop, but Lester is fully involved as the baker and ice-cream maker. Lester is religious, enjoys gambling on occasion, loves to play music and entertain, and is regarded by his wife as a fool.