Perfectly reasonable to NOT agree to spend a lifetime with a stranger simply because they're sorta good looking. After all it looks like this world doesn't really believe in divorce/remarriage for women.
So yeah. Definitely wouldn't miraculously accept a stranger as my eternal partner simply because they're straightforward and honest.
However obviously after a while when the strength is exposed, cooking exposed, hero status exposed, loving care gentleman attitude is exposed, etc. The girl falls for it.