It was always about keeping up with the joneses as a suburban housewife. Like Sarah’s hospital job at the hospital, her daughters was nothing more than an accessory and validated her role as a strong feminist. This is apparent when she only cares about her status at the hospital and spends so little time with her daughters that she willingly pawns them off almost every weekend.
Wow Chillie, this is a pretty harsh view of Sarah's character. There is so little written about the family unit home life, that it's hard to support a view of Sarah being a uncaring mother.
Let's address the "pawning off the kids." It was established from the beginning that her trips to Chicago were once every three weeks. I don't find this unreasonable- a lot of couples/single parent use grandparents/extended family as backup caregivers; need to run an errand, have a date night, or the occasional weekend get away. (I did some digging and yes the drop offs do become more frequent as the story progresses after Ch14.)
Regarding her status at the Hospital. Its been written that she takes pride in her work, she's an accomplished professional and her peers view her positively. She showed promise as a leader, was lead to believe she was being considered for a promotion and then didn't even get an interview. I don't think it's unreasonable for anyone to want to be treated with respect and equality in the workplace, well, in all walks of life really.
Sarah as a Mother: Everything we've read (with noted exceptions) has shown Sarah to be a very loving and caring mother.
- Yes she had a weak moment in her office with Lester and the kids weren't picked up on time. It's not good, but it happens, regardless of the circumstances for a parent make mistakes.
- Yes she had a lapse of judgment where she entertained the idea of the kids living full time with grandparents while in the heat of the moment with Lester. Again not a good look but understandable.
- More questionable was her saying that her parents could look after them full-time when speaking to Dan.
- The worst example was Lester making her choose to ignore them for sex in the hospital parking lot. (Really bad but as written she knew the call/text was Dan, not kids.)
Does all this make her a bad mother, who views her children as obstacles? I don't think so. We can't judge her for things that aren't written about. For all we know "off page" she may spend all her free time spoiling the kids with her love, to make up for the times she is not around. What this does show is that she is a flawed individual, just like all humans. This in turn is what adds depth and realism to the fiction.