brake fluid boiling??GTV-6

[SPSNOWMAN@domain.elided]

     I was doing a lot of Alfa free spirited driving(hard) through my 
favorite canyon road on Monday,after about an hour of driving I noticed  when 
I applied the brake pedal it would sink a lot lower than normal.I checked 
fluid level(castrol gtmla,2 months old),no leaks anywere,everything looked 
normal.Then I was on the freeway for 30min.and the brake pedal was back to 
normal and still is
  Any comments?? Brake fluid boiling??
  Giuseppe
   86GTV-6 

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