Fucking Your Step-Sis Behind Step-Mommys Back

Step-sis Isla has been getting very close to her step-bro ever since she moved back home after breaking up with her boyfriend. Her step-bro has been a big comfort to her and they both have been screwing around behind Roxy their step-moms back. Your laying in bed with your step-sis Isla and she tells you how your step-mom would be so jealous if she ever found out about your affair. You must keep your forbidden love a secret otherwise she'll just try to steal you away for herself. Isla is so turned on laying naked in bed with you that you end up fucking again with Roxy out of sight. Virtual sex with your step-sis begging you to cum inside her and you both cum together with an explosive orgasm. She tells you best to get back to your room before your step-mom comes back but she'll drop by your room later for a snuggle.
Step-mom Roxy confronts you in your bedroom, she suspects something is a miss and all that cosy time with your step-sis Isla hasn't gone unnoticed. She even saw you sneaking out from her room earlier she wheedles the truth out of you. She is shocked to discover that you two have been having sex together and tells you how wrong that is and reminding how it would never work the two of you as a couple. However she is also immediately envious over the fact that your step-sis has you all to herself, step-mommy can't stand the thought of you being away from her. Her jealous streak takes over and she wants to rekindle that bond you once had. Just to spite your step-sis she must have you too! Your possessive step-mom lures you onto the bed in a bid to win you over, she begins sucking your cock calling you her sweet boi and it's not long till she's back on top of your cock taking control, riding you back inside step-mommy. Your step-sis returns in her dressing robe and is furious to see her manipulative step-mom fucking her step-son! Roxy isn't too pleased about the interruption and calls her out for her behaviour of fucking her step-bro in the first place! Isla storms out in disgust and is so upset knowing her step-mom is only doing this to spite her.