In my time, I've been a DD, a DS, a DSD, DSS, a DM, a DSM, a DMil, a DSMil, a DGM and a DSGM....so I think I have some experience here!!
I didn't see the problems my dad had getting me to bond with my DSM, and she was a really nice person, but somehow I still resented her...which I now regret!
I've had issues with my DSC, although they were practically grown when I came into their lives. It was mainly down to DH being a total DisneyDad, which I think is the default position with divorced dads, and boy oh by, do their kids soon latch onto that!
I resented the fact that one of the DSC used her dad as an ATM, and it took him a bloody long time to wise up about it!
Things are better now, but of course we've arrived at the DGC stage, and DH sees it as his duty to be the all loving, all giving, never saying no Super-Grandad....which in fairness he extends to both his and my DGC totally equally. However, he cannot refuse them anything, (I know!!!!) so, whenever for example, they want sweeties before tea, he'll always say...well yes, if Grandma is OK with it, and Grandma has to say no! What does that make me, always the bad guy?!
However, he is learning slowly, not to undermine me, because I love them all, but for gods sake someone has to control things! So my advice, talk, talk, and talk some more, until you're both on the same page!