Am really not sure what to do here and would appreciate advice from those who have more years of experience of 'blended families' and step-children.
Basically, we (DH, me, DD and DS) have DSS (5) with us for most alternate weekends and a few weeks holiday a year. DH is brilliant at not being a disney-Dad and all kids live under same rules, expectations etc. However, it's becoming a bit of an issue that DSS only ever wants to do activities with DH, sit next to him at dinner, hold his hand etc. None of it is particularly age-inappropriate, nor do I take it personally that he's not interested in time with me, but it worries me that DSS seems to be getting more insecure (I presume this is what's at the root of this, although happy to hear other suggestions!) as time goes on.
DH does give DSS a lot of attention, kisses, tells him he loves him etc and they have a lot of one-on-one travel time together, but he is also scrupulously fair about giving attention to DD and DS when we are all together too, which I can see DSS is starting to resent enormously. I've noticed glares, stomping off, behaviour calculated to divert attention back to him (either misbehaving or e.g. suddenly demanding cuddles when DH is busy with the youngest), none of which DH panders to but I'm starting to wonder if he should a bit more...
What is the right thing to do in this situation? It doesn't seem fair to DD and DS for them to be treated differently, but things seem to be getting worse with DSS and I'm at a loss. There is no talking to the ex about anything so we have no idea what goes on at his main home, but he is an only child to an overprotective SAHM so obviously will not be used to sharing attention. Does DSS just have to learn about sharing/family life or is there anything we can do that won't also be unfair on the other DC?
Thanks for any thoughts!