You see, I did this:
It was my Mums birthday this week, and for the first time in many, many, many years, I had the opportunity to actually celebrate it with her. I started sorting out a visit, but without telling neither her nor my Dad!
Instead I collaborated with my cousin who helped out planning the surprise and my Mum didn't suspect a thing. She really wouldn't expect me to come home for it, especially not just a month before we are coming for the summer holidays anyways. So it was a great surprise!