I think it depends in where you live, in the US, the BF proposes to the GF and give her an engagement ring, and she accepts it and says yes that is the American way of being engaged. But in China, the couple sets up the date of getting marry and inform the both side of the parents, relative and friends is already consider engaged.
Depends on what gender of kid two of you have in future. If it is a boy, who know how tall he will become. Haha. Me (168 cm) my LG (183 cm), and my daughter is always in the 85-90% tall in the group of same age girl group in the USA for her doctor's checkup. So your kid will be out of the chart i guess. I am curious to find out how tall Yao Ming's daughter will turn out to be?? (between 226 and 190 cm)