Not at all. I often speak hereon for both my housemate and myself. After nearly 20 years together, after starting out thinking a
LOT alike; after having a similar large vocabulary; etc. etc. etc. we can easily finish one another's sentences and even speak for hours as though we were the other person without saying too much amiss of what the other person would say themselves.
And, my 2nd husband, who was also a friend of Qx's was also very similar.
So, when I say "we," I mean, Qx and I.