['I was about to go on maternity leave when my coworkers threw me a baby shower.', "Hey that's great of them!!  Did you get anything cool?", 'I got lots of cool stuff and I had no idea they were planning it!']
That's fantastic!  What an awesome day, huh?
I was about to go on maternity leave and my coworkers threw me a baby shower at work. I had no idea they were planning it.