Stepsister offers brother and his girlfriend a threesome

What you shouldn’t do in life is be greedy with your loved ones. So the guy’s girlfriend quarrels with him recklessly, but his beloved sister kisses the boy so infectiously that he wants to reanimate the relationship, which she does very soon. Well, since my sister is very envious of all this, she seduces her brother’s friend into lesbian sex. I wonder how long they will bang one girl for two? How do you think?