Considering that mavic just launched road UST today solely for mavic wheels and mavic tires, your description of anything being the same as road UST is likely inaccurate. There's a bikerumor.com series of articles that goes into more details about the history of the *f##k* that is road tubeless.
TLR only applies to trek/bontrager components/tires, yes? Is there anything special about them compared to other brands?
If they're proprietary and won't accept another UST tyre then they shouldn't be calling either the rim or the tyre UST at all. Hence my wondering in another thread on the newly launched Mavic wheels if they are a true UST or not. If they are, they'll accept other UST tyres.
Mavic has been trying to go the "full wheel system" route of paired wheels and tyres for a few years now. That has not meant that any of their other rims won't take non-Mavic tyres. I can't see why this would be any different. I read the launch article from VeloNews and it touted that they Mavic tyre is made to work with the rim. It did not state that other tyres wouldn't work with the rim. It was part news article, part sales pitch. So yes, they highlighted that the Mavic tyre is the tyre to use with the wheel.
TLR is not exclusive to Trek/Bontrager components. Maxxis makes a "tubeless ready" version of the Padrone as well as a UST tubeless version of the Padrone.
I would say that TLR is more analagous to "tubeless ready" and have seen the two terms used interchangeably, i.e. can become tubeless with the use of tubeless rim tape and sealant. Enve's new "tubeless" carbon wheelsets are actually "tubeless ready" as they require rim tape. This is as opposed to the Easton Aero 55, which is fully tubeless with a sealed rim and requires no rim tape.
As for the OP, if you're worried about making a mess and upsetting your other half then there are ways to put sealant into the tyre without getting it everywhere. Effeto Mariposa make a sealant injector that is very nice. It is very good at keeping sealant from going everywhere. Remove the valve core after mounting and seating the tyre and use the injector. Simple, easy, effective, and minimal clean up, if any. The product page is here: http://www.effettomariposa.eu/en/produc ... -injector/
and you can find it for sale at Amazon or any number of other online retailers.
That'll work regardless of if the OP has a UST or tubleless ready wheelset.