Recreation

I own a Westin Maui timeshare which I may not be using next year because my friends want to go on a family trip to Europe next summer. We can't bank points for the following year, so we either use it or lose it. I really don't want to go to the hassle of renting it (but will if I have to) and I'm not eligible to convert it to StarPoints because I bought it resale.

So I'm wondering if it would violate any T&Cs of SPG.com if I offered up my TS in exchange for an SPG member booking European hotels on my behalf?
I know that Marriott allows me to book rooms in someone else's name. I can't find anywhere on the SPG site that allows or prohibits this, so that would be my first hurdle.

I know we can't sell StarPoints, but I'm wondering if this would be kosher and, if so, could I list it in the Coupon Connection? I am an above-board player and don't want to do anything that isn't perfectly legal.