My DD is 21, she's a lovely, sociable, smart girl. She studied sports science and is now doing her MSc in Sports and Exercise Medicine. She entered into a new relationship in January, the man is 28 which to me feels like a notable age gap at 20/21, but I appreciate others may feel differently. He is from the Middle East and has made it clear he plans to move home. He proposed to DD at the start of the month, which felt quite fast since they'd been together for maybe 10/11 months at the time, but we congratulated her, she seems happy and airing our opinion is only likely to cause upset.
Tonight DD came over for dinner, without her partner. She told us she is planning to get married in the summer and then move to his home country with him in the autumn after she graduates. I asked if she has a plan for once she is there career wise and she said maybe some sports coaching but he can afford to support them both. This felt like a red flag to me as I don't want her to be fully reliant on anyone else to just survive. She was also honest and said having children is high on her priority list and she "doesn't want to wait until she's older and too tired to be an active mum". I felt a bit gobsmacked tbh, but just said she should spend some time thinking about if this all what she really wants or if she is doing it because it is what he wants/feels pressured.
Since she left I haven't been able to stop crying, my partner thinks we need to have a harsher word with her, note the risks more plainly, such as difficult getting a divorce, likely not possible to have children there, break up and move back here with them (due to The Hague Convention) etc.
I know she is an adult and entitled to make her own choices, but 21 still feels very young!
AIBU to be so concerned? What do I do?