I've NC for this as I've spoken about this IRL.
Well here goes...I'd really like to have a great relationship with SIL and MIL but it is hugely strained by distance (they are at the other end of UK, DH moved here to start a life here before we met here) and MIL's belief that I am the reason DH doesn't see them as much anymore - one of his explanations to me was that my PIL used to pay for tickets for him to visit so he was obligated to whenever they asked and had no commitments before he met me. MIL is very generous when it comes to treating me and DH and has made me feel welcome in her home on the surface of it but other instances have made me feel like she has an issue overall. MIL wants us to visit every other or monthly where possible, each time spending £90 to get there and back (although they offer to pay, I feel uncomfortable about taking anything, DH usually accepts half of the cost when we do) and stay with PIL for 2 or 3 days (when work permits but at least a weekend) at a time. She has said and done some things in the past that made me feel she was 'off' towards me; I wouldn't understand certain things because my parents divorced and half siblings didn't grow up in the same household whilst I lived at home, she's told me some of my fears/thoughts are just silly which I have shared with her in order to bond and she sulked when we hadn't consulted her before booking our wedding venue at the time, etc. However, she doesn't seem to do this with DD's partner and DD is not much older. We've had a few good times where we've spent time together alone and they go well but as soon as we haven't seen the family in a while, I feel as though I get blamed for it again.