Doris had made her living as "Olga" - a dominatrix alter ego charging men handsomely for sex involving corsets, whips and "unusual methods". But when she married aged businessman (and former client) Henri Jouannet, she'd promised to give it all up.  
The coming of war put a strain on the couple's finances and their relationship - and Doris secretly returned to selling sex. But the trade had changed - instead of seeing her regular clients, "Olga" now meets strangers on the street... including The Blackout Ripper. 
Further reading:
Billock, Jennifer. ‘Five Hotels That Were Occupied by the Military During World War II’, Smithsonian Magazine, 28 October 2019
Laite, Julia. Common Prostitutes and Ordinary Citizens: Commercial Sex in London, 1885 - 1960 (Basingstoke: Palgrave Macmillan, 2012)See omnystudio.com/listener for privacy information.