I'm quite sure it is Senecio articulatus (candle plant), although I've never grown it myself. It is either stretching for light, or could be its natural growth habit. Maybe you can stake it to make it grown straight?

Your Senecio needs more light. Your plant will not shrink back. I would suggest cleaning it up. When spring comes cut all the spindly etiolated parts off. You can break pieces off if too long. Just stick those pieces back into soil. Eventually roots will form.Might be a good idea to take it out of pot to inspect the roots. If everything looks fine repot in a fast draining mix. I suggest getting some perlite or pumice. Do a mixture of 50% perlite or pumice and 50% C&S soil.

Now when it comes to light you will probably always have this problem, unless you get supplemental lighting during the cooler months. I don't use lights so can't help ya there. Would be a good idea if every once in awhile you start to see your plant reaching for the window to give it a turn. So the plant can get light on all sides. Hope that helped. Goodluck:).

ps- I love the snow in the background:).