I am 34 my girlfriend is 52. Been together for 5 years. The age gap hasn’t really been an issue.

She has a 16 year old whom she loves with. He’s a lovely guy and she seems like a decent mother.

We’ve been doing role play whereby she’s my mommy and she calls me baby boy etc. it’s really hot and we get into it deeply.

However alarm bells have started ringing for me. I always see her checking out young men around 18.She and her son are very close. She showed me old photos where she was giving him a bath and he was 8 years old, completely naked in the photo (penis out) I found this odd but didn’t want to make what might seem innocent into something perverse.

Anyways she told me recently he keeps taking his top off and showing her his muscles , telling her to feel them. She said oh my bat boy is all grown up etc. he’s likely just seeking validation and taking pride in his experience. She doesn’t like him having a potential girlfriend and I’ve just always felt there was a strange incestous vibe between them as it’s only been them since he was born.

Am I overthinking this or is it possible she is using me to enact her hidden fantasy of being attracted to her son and wanting to have sex with him ?

Or am I just jealous or embarrassed of our role play , not sure.

Any advice or thoughts ?