You're not being too sensitive.... Everyone has their own right to feel how they do. You know your sister.... Is the the kind that "gushes" over things? Or is she just a "Hey, thanks!" Kinda gal. If she usually is a gusher, than I would be taken aback by it too.

I made 8 quilts for Christmas, and all but one have been delivered. The ones I gave in person were very well received... But the three that were given to family out of state were only recognized because my mom took a video of them opening them, told them to say "Thank You Jessica", and sent me the video. Was I expecting cartwheels... No. But kinda thought I would have gotten a phone call or email from them. Ah well. It made me feel good to do it... So to me that is what is most important.