There is a spray (for the house only, not to be used on animals!!) called 4fleas which is very effective. You close all windows, take a deep breath, hold it, spray around the room and rush out, closing the door. Leave the room closed for a couple of hours then open windows to air.
One of my grand-daughters is a target for fleas, a house can have fleas and no-one gets bitten (so you don't know they're there) but, if Phoebe goes in ,within minutes she is covered in flea bites. So, if you're not bitten doesn't mean fleas are not present, they're just waiting for Mr. Right, in this case your Dad!
Anti-histamine cream is good for bites. Hugs are good for miffed Dads!