from personal experience do not reprimand or critique reading speed and accuracy much. happened a lot at the start of my relationship and i pretty much would not read to her or around her for the better part of a year.
as for concept learning, i never found that to be much of an issue with my dyslexia. i like learning the concept before the details but i think that is more so i can organize the details more accurately. the biggest thing is we generally know we are slow at reading and tend to error more often, i am very self conscious about it and having someone that i care for harp on me about it is a big deal.
if the two of you take to reading the same books it can be a good experience (always had my own copy because i tend to have to spend more time covering what was read). talk about what you got out of it the next day or week whatever pace you decide to read at. things like philosophy and poetry can be great subject matters to get to know each other better and open up communication.
hope this sort of advice is what you are looking for (looks like i may be a few years late however).