Friend's eager cousin

A friend of mine wanted me to teach his cute 18 y.o. cousin how to French-kiss, but once we started doing that this naughty kitten asked me to pull down her dress and kiss her nipple. My lips made her moan of pleasure and those turned into screams of orgasm when I fucked her hard right on her two-storey bed. It definitely wasn't her first time and she fucked like a good slut, but her cousin doesn't need to know it's my dick she loves taking in her tight welcoming pussy.