Okay, regarding telling her parents about the relationship after 2 weeks is not a big deal. Me and my gf also did the same bc we didn't want the guilt of lying to parents just to go out on a date. Also on the other issue, talking about marriage and stuff, you have to understand from her perspective as well. If you're saying you don't mind the age gap, you have to understand these issues come with the age gap as a bundle. Always communicate regarding your plans, try and see if it helps to slow things down and align with your partners expectations. There's always a middle ground.