I haven't read all the replies so hope this reply is still on track... I am not a step mum anymore but I was and I was really affectionate towards my DSD's. It is probably the only problem their bio Mum had with me (we weren't friends but got on okay). However she did have issues with that (whether she was around or not.) And yes, I did tend to keep my distance a bit more around her out if respect I guess. I'm a Mum too and I guess I didn't want her to feel threatened by me. Or maybe she's not a affectionate person?