The listing for Ethel says there are two more people officially closed, implying that they were born after 1915. This would fit for a widowed lady with two children. If it is the right Ethel and she was temporarily staying with relatives.......
The HUSRLEY household containing Ethel & 2 others was at an un-numbered house in Ashburnham Road; it is the 11th entry on the 3rd page (each of 20) if you work through all the addresses in that street. Also Ethel's status is widowed.
The other 2 people could be daughters Dulcie Eva born June 1924 & Sylvia Mary born Sept 1920, but we'll never know - unless you can prove that they have since died.
Hemmum - I suggest you shell out £6.95 ** to see the entry ... if Husrley is indeed mistranscribed Thurley then you can ask to get it corrected... The image will also show entries for other unclosed people in that same stretch of Ashburnham Road which could identify where they were staying, if checked against a 1938/39 Bedford directory.
later ** seems FindMyPast now are offering 60 credits for £4.99 using discount code 1939VIEW, but only until end of 26th Nov....however credits valid for 90 days