Was just sitting watching TV with dog beside me on sofa when I felt something in my bra. Reached in and retrieved it and it's a flea. 
The cat was outside at the time and earlier this evening I groomed the dog (outside) so I'm guessing the dog is to blame.
Have checked the calender and it's just short of 4 weeks since I treated the cat and the dog with Spot On. I've just treated them both again all the same.
Am I going to have to treat the carpets and the furniture too? Can I assume a flea in my bra means an infestation? None of the family have had any bites?