I do agree that we shouldn't be snobbish about her career but...the commute from Stoke to Manchester is over 100 miles, round trip. Petrol money alone would be £30 to £40 per week? Nearly £2000 pa. The childcare (and I'm making an assumption here) but I'm guesssing she would pay for what was considered a 'good' nursery, would be £500 to £600 per month, £6000 to £7200 pa. So possibly £9000 pa from a £18000 to £20000 salary seems a lot for the exhaustion and, for her, the guilt.
Personally (and this IS only my personal view), but, not being someone overly burdened with a work ethic, I think those kind of hours are crazy for ANY job, with or without kids. She may get a buzz out of it.
The web chat on the C4 site revealed that Kate actually has a job anyway (youth worker) so is not anti working mothers plus she enjoyed the socail life of Tracey's job. Maybe she just din't want to give up her adult identity adn recognised in herself that she wasn't that enamoured with the staying at home bit. For someone who 'appeared' quite uptight, I would think that would be a very difficult switch. But agree with whoever said she may have had more viewer understanding if she had been open about that instead of trying to justify that it was for Lottie to have a beautiful home etc. Kids don't really care about beautiful homes, I don't think. Well, at least I hope they don't!