Hi Ipri,
If you just want Sky in one other room, you can buy a "magic eye" control (they're available from lots of sources, including major DIY retailers), and connect the other TV from the 9v output at the back of your Sky box (using good quality satellite cable), into the magic eye, and then into the RF (aerial) input of your second TV. The magic eye enables your remote to control all the functions of your Sky box from the room your second TV is in. I think it is even possible to route the feed into an aerial distribution amplifier for connection to multiple TVs (though you need to check it is compatible with the magic eye - some are not). In that case, you'd need a magic eye for each TV. The drawback is that you can only watch one channel at a time, so you can't have two different programmes on at the same time. Multiroom is the only option if you want that.