Pregnant? By my sister's boyfriend!!!!

My sister was visiting me with her boyfriend at the weekend. We were out partying all night... The next morning I was just on the toilet when my sister's boyfriend actually came in with his morning wood, still half tipsy, he pushed his strap into my mouth... My sister could burst in at any moment... Then what? He continued and fucked me hard and horny... The loud moaning could be heard throughout the apartment, then the bastard squirted everything into me: I'm not taking a pill!!!. What an ass!... if I get pregnant now.... OMG!!!.