Ciara, I say if you both wanna be doing it then do it!
Just be aware that if you aren't together then you may risk getting hurt (okay so I guess that you run that risk anyway even if you are together)
but how are you gonna feel if he suddenly gets a girlfriend, just make sure he isn't using you honey, and that it is really what you want.
To answer your question, i'm still with my baby daddy, we haven't been intimate for a few weeks but i'm putting that down to my hormones in these first months of pregnancy, he hhas made the effort I just have'nt been interested.
But we are still "intimate" in other ways, lots of cuddles and just being together.