I understand this take, but the issue here isn't HOW I respond to my mom but that I should be able to CHOOSE how I respond to her and what my relationship with her looks like.
The boundary that needs set is not with my mom, but with my dad, to make it clear that I do not want to be his proxy in his efforts to always meet my mom's emotional needs. He has always placated her, despite the harm it caused us as children. Now he is getting older, and frankly I think it's harder to keep up with her because he has less energy and age-related health issues. More and more, he's "tagging in" the kids for help of this kind. And to clarify, the request isn't to simply encourage her that she could take a few classes; it's to research options that he can share with her, and, as my sister paraphrased it, to "pour it on a bit heavy" with compliments about how much we appreciate her.
One thing I've discussed a lot in therapy is how I struggle to express genuine affection with my family members, despite the fact that I do love them deeply.
So now he interacts with me in that way too.
The "there's no harm in {insert seemingly benign request here}" approach is actually the mindset I am trying to sort out how to address as I navigate this. Because, in fact, there is great harm. It's once again putting my mom's needs in front of everyone else's for the sake of peace. Watching that example growing up is what landed me in an abusive and toxic marriage. How to explain the harm in something that seems so benign on the surface is where I struggle.
I agree with all of this and have experienced what this is like. I also agree there is harm in walking on eggshells and placating/appeasing someone. I think you are spot on in implicating your father as the one to have boundaries with.
One reason I think for the many responses to your post is that- we have been in this situation, in different ways and so, we've seen the reactions to doing so. It doesn't mean don't do it- choosing to have boundaries is the emotionally healthy choice- it's the outcome to be aware of. Since I wasn't aware- this is a "what I wish someone had warned me about" post, not a "you can't do it" post.
I agree that what your father is doing isn't OK, and he's the half of the pair and the issues with your BPD mother. In this sense, he's been her co-emotional abuser by enlisting you as a secondary caretaker probably since you were very young and not considering the effect it has on you. Your feelings about this are valid and it makes sense that every time he makes this request, it feels bad to you. It does to me too. Whenever I was in a position where I was expected to emotionally caretake BPD mother, it felt icky.
I also observed my father getting older, more tired, and less able to provide the emotional careraking BPD mother required. At some point he lost his own self in this relationship. The two of them were enmeshed- one person. One will- hers. But there was more that I didn't see as I also didn't live near them, and only saw them for visits. It was when I stayed with them to help with Dad that I saw, for the first time, what it was like to be with them 24/7, and it was way worse for Dad than I imagined. I even called social services to see if I could intervene but since he was legally competent, he'd have never agreed to that and I could do nothing. This was an emotional and vebally abusive relationship and if BPD mother wasn't placated, if people didn't do what she wanted, Dad would be the dealing with that.
At this point, after decades of this, he seemed like someone with Stockholm syndrome. While to me, he appeared to be the more reasonable parent to try to reason with, in this situation, he wasn't able to be reasonable. When BPD mother wanted him to do something, she could be relentless. All he wanted in the moment was for her to stop, even if it was temporary.
I also can relate to not feeling affectionate with family members. One alternative to this is that we don't feel love or affection with people we don't feel emotionally safe with. It's hard to be authentic with people who aren't emotionally safe to be with.
Like your counselor has advised- showing up more authentically is a good thing, it's important, and I was also encouraged to do this too. It has had benefits for me personally to work on this but disordered family members may remain disordered.
You can choose how to respond to your father's request and also choose your battles. I don't see in your posts where your goal is a potential rift in family relationships that could result from this kind of boundary setting. You've had counseling and recovery but they have not. From what I see in your posts, your goal seems to be how to have boundaries and still maintain these relationships.
Mine was to maintain the geographical distance- where I could have my own space, and boundaries. I had an emotional boundary with her- kept emotionally neutral- grey rock. The choosing my battles was about deciding how much I wanted to have drama during the visit- not about placating her. In this situation, I was still choosing what boundaries to have, because if every boundary is a battle, it was about what to go to battle over.
The sad and unfortunate aspect of our relationships is that- even if I could be authentic, due to dysfunction, I don't think my parents could "see" me as who I was and it wasn't personal to me. For my BPD mother- what she saw in people was through her sense of feeling like a victim and her projections.
For my father, in his situation, anything that increased the issues for him was a last straw. And while I completely validate your experience, and feelings, I can see your resentment- and it's valid but bringing your feelings to your already ovewhelmed and possibly abused father is not likely to bring you two closer. There was a sign in my therapist's office- "hurting people hurt each other". You are hurting, Dad is hurting. Yes you can choose what to do but put that choice in context of what your overall goals are when considering that choice. How we implement boundaries can be a choice too.
We are "on your side" here and have experienced disordered family dynamics. What your father is asking of you isn't OK, and your choice is how to deal with that. You can choose and also post here for support and feedback whatever you do choose to do.