Short background - Had a short relationship with ExP which broke down when DS was conceived, ExP's DF (who I've never met) has known of the pregnancy since I was 9 weeks, ExP was scarcely in contact throughout the pregnancy, wasn't at the birth but got in contact when DS was 2 weeks old. He has 'stepped up' and sees DS a couple of times a week, paying for him and buying things he needs.
I know that ExP's DF knows who I am as he got his gf to look me up on facebook, comments were made to ExP about pictures I have on there (I've since changed all my privacy settings) but no contact made from their side.
Fast forward to DS being almost 2 months old and no attempts have been made to meet me or DS (his first grandson) and not to drip feed but ExP has a DD and his father is very active in her life.
ExP has accused me of thinking "no-one wants to meet DS" to which I replied well no-one has! My gut instinct is to think he clearly doesn't care about his grandson so why should we care about him? Not too sure where to go from here.