Karmic relationship - for sureAs for the other interpretation I am not sure.
Could be a heartfelt relationship that ends in divorce and separation yes.
Or in a more positive light, a love that will grow slowly and be like a protection or save harbour to those in it.
Or a love that starts in a hospital.
Or a love that will very slowly grow towards an official status.
To be honest though if I see Tower ending a spread starting with heart, I usually get a feeling of separation and isolation.
I hope I am wrong