Flame Aura and Grappling enemies

[Argol]

So here is the situation. my Magus, she had elemental Aura, Fire active and we were fighting Moonflowers, who are vulnerable to fire. Their gimmick is they grapple their victim and cocoon them.

So my character was grappled and then drawn inside the cocoon all the while she had the aura active.

There is nothing in the description of the spell about grappling, but is there any other rule about this kind of stuff or do I have to rely on the GMs ruling in that it just added a bonus to my CMD >.<

[Balacertar]

That's a very rare situation, but can result in a lot of fun. For reference:

Elemental Aura wrote:

This spell forms an aura of energy around you, damaging all those that come near you.

Choose an energy type: acid, cold, electricity, or fire. Creatures adjacent to you when
this spell is cast and at the start of your turn take 2d6 points of energy damage of the
selected type. This aura has an additional effect, depending upon the type of energy
chosen.
Fire : Creatures affected by your aura catch on fire ( Core Rulebook 444).
Creatures adjacent to you are allowed a Reflex save to halve the damage and negate the
additional effect. The aura's additional effects do not stack if a creature takes damage
from your aura multiple times. You may only have one elemental aura in effect at one
time. When you cast this spell to deal acid, cold, electricity, or fire damage, it is a spell
of that type.

Moonflower Pod prison wrote:

This works like the swallow whole ability, except the moonflower can only use it once every 1d4 rounds, and the swallowed creature is immediately wrapped in a tight digestive cocoon and expelled into an adjacent square, where it takes damage every round (2d6 bludgeoning and 2d6 acid, AC 15, 25 hp). The cocooned target cannot use Escape Artist to get out of the cocoon. Other creatures can aid the target by attacking the cocoon with piercing or slashing weapons, but the creature within takes half the damage from any attack against the cocoon. Once the cocoon is destroyed, it deflates and decays. Each creature swallowed by a moonflower is encased in its own cocoon.

Thus you would usually deal damage to the flower, as you were expelled next to it, but in this case you are inside the cocoon, which your DM can reasonably rule is confining your aura in its interior. It seems quite natural though that the aura shall do damage to the cocoon, even if energy damage is not cited by the text. Fun thing is, if the cocoon fails its reflexes save, and it kinda of automatically will do it (vulnerable to fire immobile object), it will catch fire, and even if you are immune to your own spell, you might as well be damaged by the resulting flaming cocoon or at least its heat. Fun situation for all other people at the table.

As for the grappling action itself, the spell says nothing so I see that +1 CMD as more than generous. It would be different if the spell damage was activated by entering inside your 5' threatened area rather than just as continuous damage at the beginning of your turn.