My DH earns a bit more than that, I don't work but I am a carer for my middle child so recieve carers allowance. We also have 3 children, and any wage I earn in my career (given the hours and roles available to me) would remove carers allowance, and the hours I work would incur high afterschool childcare costs. So for us, with shared finances, it is financially more viable for me to stay at home.
I stayed at home until my eldest was 22 months, again due to financial reasons, and job availability in my area. At the time I took maternity leave with my eldest, I was working in a minimum wage role and had to get a train to a local city for that, so costs were again higher than my wage would have been.
My DH and I have always shared finances since we got married, which meant that we have always had equal access to all wages regardless of who brought it in. We also budget together for savings/ household expenses etc. If we didn't have this set up I wouldn't have stopped working at any point.
Bear in mind that with your partner earning 60k, you won't recieve child benefit, unless your partner puts 10k into their workplace pension scheme.