Not if it’s just in your mind and you don’t discuss…
Edit: BTW I’m in this situation near daily with several friends. They do what they do but I’m always upfront about where my natural bid caps (letting them know they would need to be ready to go higher, np), if at all, or remain silent and bid my honest intention, same difference. They all know this about me, that my words and bids are always upfront and honest, that I don’t and won’t step aside or add bids to help a consignment or add pain to rivals, that I will bid up to my number though in anything of interest: all understood, no big deal, no messy divorces 😘