Bought my travel system! Where to keep it?!

Leah
Wahoo! 
I went shopping yesterday with my
Mum and Dad (hubby was at work) and bought our travel system.
It will be delivered to my mum and dads house, but how long do I keep it there for, and when would be a sensible time to bring it back home to our house? In not at all superstitious about having it in my house, but my
Mum is a little bit. 
Any thoughts?