W.G.
I went back and read your original post as this one did not really go into much detail and it seems to me from reading both posts that your issue is they want to spend time together – I am not sure how this is a problem. It seems selfish to me that you are absolutely not interested. They were his family before you were and you and he will want them to celebrate your daughter’s milestones and successes as the years go by, trust me on this. It is important for her to know al her family. From your descriptions, it does not seems that they are mean or spiteful or crazy or alcoholics or control freaks or in need of any mood altering medications….they are family – a family that he was close to before you came into the picture (and you had to know that if he and his sister were roommates at one point in their lives).
So you did not come from the same type of background. But you fell in love with him and chose to have a child with him and they have molded him into the man you fell in love with. If your issue is getting together for family birthdays at some point you either need to suck it up and go or let him and your daughter go if you are feeling overwhelmed by it all. But IMO you are only cheating yourself. To have him lie for you and to lie about your daughter’s health – I am not superstitious about much, but I never lie about my children’s health to get out of anything – not work, not parties, not other social obligations, nothing.
You say ”he hates to stand between his family and me, but isn't that his job?” No it is not – Grow up – you are an adult – if you don’t want to go fine, don’t go - or set limits – if you go and you are worried about messing up a nap schedule or a bed time routine or whatever say you will be here at this time and then you are leaving by this time to stick to a routine. I was VERY routine oriented when my oldest (now 10) was a baby but I also realized that breaking that routine even once a month to go do “special” events was not a bad thing.
My entire family lives here (now…my baby sister just moved home from KY with a brand new baby and her husband and we are all thrilled and soaking in the family time) – as does my husband’s. It makes holidays tricky ‘cuz we go everywhere every holiday. But we celebrate each of my BIL’s bdays with a party or at the very least a family dinner – then we also celebrate my parents’ bdays, both my sister’s bdays, mine, my husbands and my daughter’s…then of course there is his family celebrations….I take my girls to my parents neighborhood for Halloween and we go to my parent’s house at least every other week to go swim or just to stop by and say hello. Then Thanksgiving, Christmas, Easter….you obviously don’t have to do all this – but some extended family time is a necessity and more than that a blessing…if not for you, for your daughter.
Oh and one more thing - you say also, "I'm tired of celebrating for his sister's kids. They still haven't really done anything that was any big deal" - SHAME ON YOU - they are children - how would you feel if they said that about any of your daughter's accomplishments that you feel are a "big deal". You just sound jealous of her children - like they are in competition with yours. Now that's petty.
I hope you can work this all out, keep going to counseling – it sounds as though you have some of your own childhood issues to work through and, as someone else said – if you expected to go into therapy and have the therapist say your right he’s wrong – that is an unrealistic expectation of counseling and it will never work. Remember your situation could be worse – he could come from a family of abusers, physical, mental, sexual, they could be drug dependent or just flat crazy and they do not seem to be any of the above. Count your blessings that you have people in your life who want to be an extended support system to you – you will appreciate that one day I promise you.