Is it normal i like bbw pussy

i am married to a bbw and i adore the ground she walks on. I particulary love it when she dresses in miniskirts that dont cover her ass. However, my biggest turn on is her pussy i love watching her finger herself i love licking it but i get most enjoyment from her sitting on my face and covering my face in her pussy. I enjoy the feel of her pussy lips on my checks the smell of her pussy the taste and being helpless to do anything but lick and kiss it is this normal