Will Botox/Juvederm/Restylane to enhance my lips make my chin look smaller? (Photo)

Botox is not injected into the lips for
enhancement. For lip augmentation, hyaluronic fillers such as Juvederm or
Restylane may be used. While adding volume to the lips will not directly make
your chin look smaller, having larger lips may detract from a large
chin by shifting the focus toward your pout rather than the size
of your chin. However, from the two photos you provided, it
appears that your lips already have nice volume naturally. You may
want to consider Voluma in the cheeks to balance out the angles of your
face--adding more harmony between your cheeks, nose, and chin.

The facial aesthetics in the Western culture have a defined relationship. Without a full profile, including the forehead and below the chin- it is impossible to comment accurately. The area above the nose- the nasion should line up vertically with the most prominent portion of the chin- the menton. It is my opinion- based on the limited photos- and your apparent overall goals- which seem to be the maximum appearance of your face-- I would recommend considering a rhinoplasty and possibly a slight chin reduction if the above positions are taken in to account. Your lips are great- I would leave them alone. Making your lips bigger will do one thing- make your lips bigger.

Aesthetic surgeons often enhance one area to give less significance to another area and more importantly to achieve overall balance of your features.  Injectable fillers are excellent non invasive ways to achieve this  quickly and affordably.  With the limited photo you provided (I understand your privacy concerns) it is not possible to access the entire face to render an intelligent suggestion.  I would suggest and in person consultation to consider your options.