Stuck with the red cock

I have been asked by a coworker as a last resort to house sit for them while they go away for vacation for a few weeks. Seeing they have no other choice I reluctantly agree. They tell me the only problem might be their friend, who can get aggressive when he doesn't get what he wants. I don't think much of it and arrive on the day of my coworkers departure to be shown where everything is in the house and to meet their friend. He ignores me for the most part and I don't believe he will be an issue. I am then left alone with him. A few days later the air conditioning breaks and a heat wave is underway. I strip down naked while in the house to try and cool down. Their friend starts following me from room to room as I start to sweat from the heat. I decide to sit down on the couch and watch tv and their friend sits and stares at me. I eventually spread my legs to try to cool off more and that is when he jumps up on me, pinning me down with his weight. It is only now I see his massive erection (his huge red cock!), but when I try to push him off or get up he snaps at me I decide to just sit still. To my horror he starts trying to insert his red cock into me, failing several times. When I panick he gets aggressive again and manages to thrust his full length into me and begins to pound me furiously. I am overwhelmed by the size and sudden penetration and have no choice but to let him continue until he throws his full weight forward and cums inside me. He then gets off of me and leaves the room. Once I compose myself I try to use my phone, but the power has gone out due to the heatwave and there is no service, so I dress and go to leave the house. But as I approach the door he pounces on me from behind, knocking me on my hands and knees where he rips my bottoms away with his teeth He then mounts me and once more aggressively fucks me until he cums inside. It becomes clear that he will not let me leave and I am stuck with it until the power comes back or my coworker returns. When I try to rest that night he comes to me once again, but I am exhausted from the day and simply give in to what he wants. I position myself on the end of the bed and I find he starts by licking me this time, which gets me heated. I start calling him to jump up and when he does I guide him into me. He is still aggressive, but in my tired state I give in to the pleasure and start to move my hips, trying to make myself cum. This excites him and I climax to the feeling of him filling me up once more. I fall back and after recovering my breath I collapse from exhaustion. When I awake the next day, I realize that was just the first day of the weeks I have to spend with their friend…