I agree that Tessa has never EVER said that skating would be something she would pursue after retirement from competition/touring. She's been talking about her next career away from skating for over a decade -- I mean, it was even in their reality show. I am pleasantly surprised to see that she has any involvement in mentoring teams these days, and maybe once she is settled in another field, she may be more open to doing things in skating.
**Again, there are old interviews where they compared themselves to siblings, but I think that as Marina packaged them in more romantic programs from 2007-onwards, they moved away from comparing themselves to siblings/family to this "undefinable relationship" thing -- which I think is reasonable, but the comparison to family members I think is the best way to think of their relationship -- close, bonded for life, but perhaps not in each others' lives all that frequently.