I wonder if his response is that because he is fearful of what his family's reaction will or could be???

DD1, I did the test whilst dh was at music practice, then we had dinner at his parents house (where he said I was just glowing, and looked beautiful), went home and we were laying on the bed when I blurted it out... He just smiled, and had this dumb look on his face. I was the one who wanted to opt for a termination. I just didnt feel ready. But we never went through with it, and the whole time he has stuck by my side.
We were fearful about Dh's family reaction. We had been together for 7yrs, even though few family members realised that. (long story) But we were sure that when we told his mum she would want us to get married before DD1 came along, she is one who believes in marriage first, then move in together, then babies. But we sorted through that with time.

to your sister and you. Im sure everything will work out, in its own strange way.