Is it safe to put a nether portal in your house in minecraft?

I build a really big, cool mansion in minecraft. The third floor has and awsome giant attic with a skylight roof. Anyway this room is actually kind of creepy looking, and I think it would look awsome to put the nether portal up there. That being said the last thing I want is the creature from the nether spawning into my house through the portal. Is it safe?