SCPX-499 "This big dick feels so good!!" My wife couldn't fit my dick inside her, so

A son-in-law has a problem with his wife's sex life because his penis is too big. His mother-in-law has noticed that something has been wrong with her daughter's relationship with her husband recently. It was supposed to be a problem he couldn't bring himself to confide, but when he sees the two of them together, he gets an erection without realizing it, and when she notices, he gets so excited he gets a full erection! "Mother-in-law...it's gotten so big..." The mother-in-law can't hide her surprise... The mother-in-law and son are gradually getting closer and are about to start.