Stepmother mistakenly gives her stepson Viagra and ends up with a rock-hard cock

I feel sick with the flu and I ask my stepmom for a paste to help me improve my symptoms surprise for me my dick gets very hard by itself and it doesn't stop she comes and asks me what's wrong and I don't know what to answer so she responsible for giving me the one that wasn't it makes me relax and puts her pussy open to fuck her hard and release all the semen accumulated in her.