Nope.
The trial has limited access intended to get people hooked. You are sharing a paid service.
You can rationalize all you want. What you are doing is the same as splitting off your cable, and giving it to your neighbors for free. Having said that, my evil twin had free cable for 2 years and copies 30 or so DVDs a month. I don't care what you do with your account. Give all of CR your password. Just don't claim it is legal.
And not to beat a dead horse, but no, you do not own any right to do that,
"We provide the Service only for your personal, non-commercial enjoyment. You may not make commercial use of, reproduce, rebroadcast, or otherwise transmit our programming, or record, charge admission for listening to or distribute play lists of our programming."
http://www.sirius.com/servlet/ContentServer?pagename=Sirius/CachedPage&c=Page&cid=1019257316747