Gaining

To put it plainly:



No. Even if it's possible, it's completely messed up. No one should be forced, manipulate or tricked in to gaining (or losing!) weight.



Yes. Or just tell her you like it.

Trying to "secretly" fatten someone up never works. Weight gain is something that anyone with any sense will notice. And when your fiance` does she may lash out, especially if she finds out you've been the cause of it.

All in all trying to secretly fatten someone is a very good way to end a relationship very quickly. If the girl means anything to you, you shouldn't even contemplate attempting this.

Your best bet is to lay all the cards out for her, and hope that she accepts what you tell her even if she doesn't agree to gain weight.