Grab (Monster Ability) + Lunge Feat

[Himokl]

I am looking at my Eidolon and trying to figure out what feat to take at 9th level. I figured I might try to take the lunge feat, for 15 foot reach on my claw attacks (quadriped with reach evolution for his claws). I was wondering how it would work if I used lunge to attack a target that was fifteen feat away, and when I hit initiated a grapple with my grab evolution. After my turn ended, I would no longer have reach to the square the creature is in that I currently have "grappled". Could I just not grab while lunging? Would I have the guy grappled in that square still? Would he be scooted forward into an open space on my turn? I am probably missing something obvious here, hence why I am asking.

[MacGurcules]

Review the combat section for the rules on grappling. You'll notice that the first step after succeeding a grapple check to start a grapple is moving your opponent adjacent to you. So you'll have no problems with reach.

[Himokl]

Thanks! I haven't really dealt much with large creatures grappling before.