Different dad's and birth!!

I have 2 kids by the same father and am now pregnant with a baby boy from a different man. My kids father passed away a few years ago. I was wondering if there are any mothers that can help give me an idea about birth. My first 2 kids were born at 34 and 36 weeks and we're pretty fast. 1 was 55 min and the 2nd was 2 1/2 hours. So that is all I have to go by, but I am wondering if this baby will be the same. It's a different father so I'm not sure. I'm worried he will be early like them, but then again I wonder if I will go full term and need to be induced and all that. Any mommies have a situation like this that can give me some kind of an idea??