“She, as well as her parents, [love/loves] Dwayne.” [duplicate]

When a sentence contains secondary clauses or phrases, that portion is ignored when determining subject/ verb agreement. Scroll to item 17.5f in this guide for a reference.

In your case, the phrase "as well as her parents" forms such secondary item, and if we imagine deleting it:

She loves Dwayne dearly.

Then we clearly need the singular form of the verb, loves. This must remain true even when we add the phrase back in.

If you really want to remove ambiguity, you could completely rephrase your idea and make the parents part of the subject:

She and her parents all love Dwayne dearly.

The correct would be 'loves' because the "as well as her parents" is not subjected to the rules of the original context.

In essence, the sentence is saying "She loves Dwayne dearly." This is evident with the use of commas around the excerpt "as well as her parents".

Consider the "as well as her parents" to be inside brackets.