Eric Joyce (left), Meg Lauder (right)
Eric Joyce allegedly met and then romanced Meg Lauder when she was 17 after she helped him with the 2010 General Election campaign by working in his Scottish constituency office in Falkirk.
Miss Lauder, now 19, was still in a local sixth form when she allegedly fell for the 51-year-old former army major, who is separated from his wife Rosemary.
Mr Joyce has two children of primary school age and his marriage to Rosemary, the headmistress of the prestigious Tonbridge Grammar School in Kent, is said to have collapsed recently.
He is previously divorced.