That won't work unless she is only inserted one record at a time.
Rebecca, your data should have a "natural" key in addition to the "surrogate" key you are creating. The natural key is a column of combination of columns inherent in the data which uniquely identify each record. You can use the natural key to look up the newly created surrogate keys in your first table.
If it's not practically useful, then it's practically useless.
If there are multiple inserts (it's not really specified here), she can see if the OUTPUT clause of the INSERT statement will work for her. That may only work if Table1 has a natural or other unique key that she can map the identity column to.