pregnancy announcement to boyfriend

Ma
Hi ladies and husband, 
I would love you opinion, 
Long story short, this is a little unexpected pregnancy we tried but I had doubt it'll work. He has no idea yet it did work so I'm planning a little surprise to announce the surprise. 
I started to do airbnb at my Bf house to help him make extra money about 1.5 years ago So we could travel and it went viral between us and his family we have 11 listings... 
Whatever, my idea was to explain the surprise with a card that will say 
" Baby, you like Airbnb so much, you decided to put a guest in my tummy .. due Nov 1st " 
What do you guys think ? 
I wanted something light and fun ..