On properness of the OU, I was responding to INeedSomeSun. I agree OP should look at all options and, being in a large city, she has plenty available. You do get tutorials with the OU, I meet real people every six weeks or so, not as much as if attending a physical establishment of course.
What suits her will depend on how much time she wants to make available, at what times of day and what she can commit to for the next 3 or 4 (with access course?) or six years. A baby would be easier to fit in with OU study than a full-time course that requires regular attendance. Though, it might be possible to start at one place and transfer to OU carrying credits across - worth checking.
Also, is the social aspect important to you OP? There are huge benefits in talking to real people and the expanding of your horizons that offers, as well as mutual support, is a massive part of the 'standard' university experience. I found that wonderful at 19-22 but now, just not necessary, as I already have a social life and life experience - but I already have a diverse mixture of friends, many made at Uni and through work, travels and hobbies and perhaps you don't or would just enjoy meeting some new people.
I came back to say, it is a really good idea to focus on a career that could follow - for your own fulfillment and potentially, security. But, your DH is not going to be impressed by that any more than by you studying if he thinks it's all unecessary.
I really think you just have to say you're going to study because you want to, it's a argument that can't be disputed in itself, though obstacles can be put in your way of course.
It will be a great example to your daughter, both of what women can achieve and that studying can be for satisfaction and the pleasure of learning, not just to buy a career (or husband).
You've been clear that your DH puts you and dd second after his parents - not halthy but probably not going to change. You need to redress this by putting you and dd first.