It sure does sound like she wants to be a grandmother, which is great.
When we were TTC with Nina my parents knew we were. And every time we saw them, she'd give me this look as if to say 'well, are you?' without actually saying anything. When I did fall pg, Heath (DH) said to my mum 'what do you reckon about being a grandmother' and she didn't get it at first that he was announcing that we were pregnant! Once is sunk in she was estatic.
Just think when you do announce your pregnancy (and you will soon I'm sure of it) how estatic she's going to be!