Time After Time by Molly Keane

The Swifts - three sisters of marked eccentricity, defiantly christened April, May and baby June, and their only brother, one-eyed Jasper - have little in common, save vivid memories of their darling mother and a long-lost youth particularly prone to acts of treachery.

Into their world comes cousin Leda from Vienna, a visitor from the past, blind but beguiling: a thrilling guest. Within days, the lifestyle of the Swifts has been dramatically overturned - and desires, dormant for so long, flame fierce and bright as never before.