I have seen people get nice furniture second hand like a half cupboard/storage unit/etc from second hand shops and install racks into them and mount everything in there and cut some vent holes at the back.
For extra points wack some flowers and a photo of your wife on top with a doyley.
I have seen one guy even model the air flow on his computer to find the right ventilation setup
NTA. I’m not sure what your father did, but it sounds like it has had a profound impact on yours and your sisters life. It also sounds that your father isnt exactly inline to win a no. 1 dad trophie.
Sounds like your aunt is coming from a place where the appearance of family, and the tradition of family is above your and your sisters feelings.
Personally, I believe fuck that. Blood ain’t thicker than water. If someone who is meant to love and care you unconditionally and doesn’t, then you don’t owe them anything.