<human>: First time posting.

Me and my boyfriend celebrated our 5th anniversary last week and I want to spice it up. Our sex life is good no complaints I just want to try something different and after reading online I came up with the perfect idea.

I'd pretend to be his mistress I'd buy some lingerie and do my hair and call him to a hotel. It seemed like the perfect idea and I asked my friend [25 F] if she could help me pick out a outfit.

While we were shopping she told me she thinks it's a bad idea and I shouldn't do it. I asked her why and she said what if he likes the idea too much and ends up wanting to recreate it with another woman.

I told her he would never and I trust him but she still had that look on her face. It's kinda making me second guess this plan and I'm not sure if it's a good idea now.

Is this a good idea or will it backfire in the future?

Can you give me a shortened version of the text?
<bot>: I want to pretend to be my boyfriends mistress but my friend said it's a bad idea because it could give him bad ideas.