Here's my take on it. I don't see a problem, especially if you and your Mother are so close.

My 92 YO Mother lives with me. I felt a little akward, even at my age, one night a girl (Xmas girl for those that have been following my saga) stayed over. Yet, it's not like I'm bringing a different girl home every night. Plus, they had met several times and really liked each other. The three of us even made breakfast together.

It depends upon the circumstances but I don't think it's disrepectfull at all in this case.