Will you be my breathhold safety?

Description: I want to practice my underwater breathhold and bubble blowing; will you be my safety?  it could get very scary and i need someone to make sure that i don't forget to come up for air!  i'm in the bathtub with my oval mask and my white tank top on; no panties or bra, of course!  each time i go under, i open my mouth and let you see those wonderful bubbles come out, sometimes one at a time slowly, and other times really fast and consecutively!  it's so much fun to see what i can do and i push myself harder so that i can give you a good show underwater!  my breasts swell and my nipple gets hard as i go longer and longer for you.  just make sure i come up for air, ok?!