One way to help him listen might be to talk more? :-) I don't know how much you talk but my T and I had the "opposite" problem in that she didn't talk "enough" and we'd get really awkward silences for long periods of time (since she, "rightly" believed it was my therapy and I was the one who was supposed to do most of the talking) and I'd get stuck. We were able to talk about it later (I saw this therapist for a total of 18 years) when I was able to talk more and she told me some of the troubles therapists have with trying to figure out how much to talk and how much to keep quiet, etc. When I thought about it I actually felt sorry for T's having to figure out delicate/complicated stuff like that :-)

If you are afraid he'll argue, I think you have to check that out by "confronting" him in a "nice" way -- using "I" phrases and saying how you feel and what your perceptions are of him talking too much. The only way you can see that not all people react like your mother is to check other people out individually and that's exactly what T's are for. "It feels to me like I don't talk as much as you do and I don't know how to work on or change that so I feel more listened to" something like that?