No, lips do not enlarge with kissing. While kissing might cause your lips to swell temporarily due to increased blood flow, this swelling will subside after a few minutes.
Kissing can stimulate blood flow to the lips, which can cause them to appear slightly fuller. This is a temporary effect and is not a permanent change in lip size.
However, some individuals may experience a sensation of their lips feeling fuller after kissing due to increased blood flow and heightened sensitivity in the area.
If you're looking for longer-lasting lip enhancement, consider methods such as lip fillers or lip plumping products.