Should I go to Sardinia?

My friend has the house all by herself...for some days while the family she works for is out (she works as an aupair). So she tells me to come and I don't need to pay for house and food, which sounds great.

but i have to cancel work and miss classes from school. and i just started my new job...it's not very good to just say that I'm travelling so I can't come to work.

But then again, this is a once in a lifetime chance. Sardinia!!!!!!!