So, if she gets me just a card on Father's Day - that's OK. I'd almost prefer that she didn't mark the occasion herself, strangely enough. Honestly, it's hard finding myself wanting anything from my wife right now.... at least, right this moment. I'm sure that feeling will change.
anything she gets for you would be most like be a gift FROM YOUR KIDS.....purchased by her of course since they are 4 and 6 years old. if they do this, why not just be gracious and make your daughters feel that it is so appreciated.
and just my perspective, if you and I were having a conversation or speaking to a therapist, etc and you began snapping a rubberband on your wrist, i wouldn't even bother speaking to you or continuing therapy...it's rude and maybe passive aggresive...say what you feel, that is why you have therapy sessions.
take yourself and your wife out of the equation for future Mother's and Father's Day. let it be about the children.