This poses a very interesting conundrum. Past interactions allude to a mutual love for one another albeit unspoken and we don't act on it out of respect for one another. On the other hand Mycroft is often disingenuous intellectually and personally to keep people at arms length. This could be one of those times or the aforementioned events could've been.
There's a lot to process here. I'll need to thunk on this then I'll get back to you in line 7-10 business days with an update.