Oh Tess, just read your updates and am so
for you.
You must be feeling so angry right now knowing DSD has concealed this pregnancy for so long, and that she was perhaps considering termination at one point and has now changed her mind.
You're obviously a fantastic mum to her, but I do think you need her to see how angry/disappointed you are, and again make it clear that this is not going to be your baby. Don't shield her too much from the impact of her actions on your family.
Has DSD come up with ay practical ideas about how she is going to care for a baby and study etc? If she has done research maybe she already has plans that she could tell you about? I also agree that you need to start giving her more responsibilities around the home-she has to get used to the fact that she will have no social life once this baby arrives. She can't be going out all the time, and dancing in her room etc, she needs know she has to grow up now.
Again I think you're handling this situation so well-perhaps that's why your husband isn't stepping up. I think if you can it would do you good to get away for a night or two and let DH and DSD sort a few things out. Unless DH would continue sticking his head in the sand...
WRT the father of the baby- I do think you need to know, and that you should try and get the info from her. Tell her it could impact the health of her baby.
Poor you Tess, and poor DSD- I feel not only did she want someone of her own who would love her unconditionally, I think she wanted to feel validated/loved by you and her father too, even to be the centre of attention (not saying for a minute you don't love her, just that a teen's perception can be so diferently from the reality).
Thinking of you all.