I don't think there is really a wrong answer here - if you feel unhappy about continuing a flight after overtemping an engine, even after advice from the ground, then that is your decision. However, an immediate return to the departure aerodrome might leave you with an overweight landing at e/o speeds in a hot & high scenario: there are definite risks involved with this. Also, the cost of putting a twin with 300 pax on the ground for a day or two plus hotels/allowances/disruption/refunds, etc. might well run to a quarter of a million pounds or more. A bit galling if you can take off again with no more than a tech. log entry.
I'm not suggesting that continuing when you feel it is unsafe is a wise move, just that if professional advice has been given that an engine is OK, a risk assessment has been made. Both engines are still working and if the Company wishes the a/c to carry on, then why not? After all, we plan for an engine failure at any time during the flight as a matter of routine.