ANSWER:
This is not something that would flip a woman’s opinion from a good person like this unless she is Ms universe!
Chance comes once in a life time and our religion states clearly to accept the man if he is religiously committed and has good moral conduct.
Being too slim is not something one would reject a man for. Tomorrow you might gain weight and your husband can think of divorcing you for that reason. Would you be ok with that?
If you reject him, there will be hundreds of happier women who are willing to accept him.
The choice is yours!