Actors Dean Winters and Glori Dei made their relationship Instagram official.

On Sunday, Nov. 8, Dei, 28, and Winters, 62, hard-launched their relationship with a joint Instagram post.

https://people.com/dean-winters-glori-dei-dating-instagram-official-12243833

As far as I'm aware, it was never implied how old Dennis Duffy was on 30 Rock. But if we use the actor's birth year (1964), we can estimate that Dennis was probably about 42. His hypothetical victim in this episode was 16, which is an age difference of 26 years.

Dean Winters is currently 62, and his new victim is 28, meaning an age difference of 34 years.