She's going to notice a nanny cam, anyway. They have clocks with a camera link, and they're rather small, but if the two of them have something to hide, they aren't going to be fooled by the sudden appearance of a new clock, either.
Maybe the boy has something on his mind and the mom doesn't, or maybe they both have something on their minds, or maybe (my third choice) this is all just laid-back attitudes about nudity and no incest is happening. But I would not blame you if you just took off. Tell the mom you're leaving because you not comfortable with the incestuous tone in the household (don't say "the incest in the house" because despite the circumstances, you really have no proof, but there is plenty of incestuous tone and that's not hurling accusations to say). If she is NOT sleeping with her son (or deliberately encouraging his sexual interest even if he is not sleeping with her), this will give her some food for thought about what she is doing with this lax sexual tone in the house. If she is in fact having an illicit relationship with her son, then you are well out of the situation anyway.
When I said "they have clocks" I meant they have the out in the marketplace, i.e., "there are" clocks made with a little camera link. Hammacher Schlemmer has them, I think. But as I said, she would notice a new clock in the bedroom, too, and if she thinks you are suspicious of her, she'll really be awake to any new device.
First off I want to say that is soooooo GROSS . How can a mother be so disgusting to even think about having sex or sexual encounters with her own SON. Noww we are not pointing any fingers but everything I just read in your post sounds way too fishy for me. I hope u find a answer and find closure to this because its sickning. If I were you I would just ask her straight up like when u see him getting. Hard on or something confront them BOTH .
Thank you both for your comments. Yesterday I told her I was going to work and told her son goodbye as I always do. I left the house with him in his room playing xbox and her laying in her bed watching TV. I came back unannounced 45 minutes later. She was on the computer in her room and he was laying on the bed, at the foot of the bed face down fully dressed watching TV. Both were surprised to see me. I just said it was a scheduling error and I am not working today. BUT 15 minutes later he gets up and goes back to his room. I say to him "you dont have to leave just because I am home, stay and watch TV". He just says, "no, I want to play xbox anyway". She says "I told him to come in to watch a TV show that was on when he was little, (Fraggle Rock) I thought he would enjoy it, but he wasnt happy watching it". So he left and I thought to myself "maybe I should have waited a little longer". But also thought maybe it is just all in my mind and they are just very affectionate. Today before work she tells me that while they were out shopping he tells her that he doesnt like to be touched anymore. I asked what do you mean? She says, he doesnt want her to hug him all the time or comb his hair, or pucker kisses that he is not a baby. I said "wow, thats interesting", then asked how are YOU with all that"? She said it hurts but I understand he is growing up. BUT I say, well we will see what happens and will see if he really means that. I was thinking the whole time that I am being told this so I wont be so observant in the future OR come home unannounced again possibly to make me feel more comfortable within the house. Today when I saw him in his room while I getting ready for work, I told him, you dont have to wait for me to leave to go in your moms room, just go now since youre not doing anything. At first he was hesitant but made his way there after a few minutes. I went down to wash up and was gone maybe 10 minutes, when I cam back he was not there. I asked where did he go? And she said "he didnt want to be in here, he went back to his room". When I left he was playing xbox. I asked him, as I have asked him before "are you okay with me being here ALL the time"? I told him I dont want to intrude on his time with his mom. He told me that the more I am here the less time she bothers or annoys him so yes I do enjoy you being here. I told him goodbye, that I was leaving for work and that I wont be back this time till late. Her and I talked a bit before I left. She says all the right things about him growing up and wants me to help teach him some responsibility and discipline.. but I am not sure if she really means it yet. Overall it was a good day and all doors were open when she left our bedroom and went into his. I did tell her thank you for leaving the doors open it makes me feel much more comfortable. MAYBE it is all in my head.. I just dont know. I do have a question though... why would ANY woman ask a man to completely move in with her and her son IF something was going on? That stuff cant be hided forever. We were perfectly fine before I moved in and I didnt expect her to ask me to move in. IF something is or was going on wouldnt it be easier for her to just have me over now and then or her to my place as it was before. I NEVER would have seen the things I have seen. This is why I still am NOT sure if aything is going on. Anyway. Thanks again for your comments.
As far as the clocks (which I have seen) or anything else, she is VERY organized and VERY clean and knows every little and big thing in her room. We have 3 clocks in there now. I did think about the clock but she wouldnt go for another one in the room, She would say there's no need for it. I did see a very nice touch lamp. and I do not have a lamp on my nightstand. Its $400.00 bucks though. Will see how things go the next few weeks and see what happens. I just cant leave just because I THINK something is happening, I must know. She is very loving and caring with me and when we are together even if her son is home she spends the majority of her time with me, she is too good to me. Her son has shown no jealousy whatsoever towards me or any bad attitudes when I am there. We get along pretty good. Thanks for the thoughts..