Alexandra Ferguson Pillows
By now (we hope) you know her place well enough to remember the decor. Let one of Alexandra Ferguson’s felt throw pillows say the lovey-dovey—or chatty French—phrase she’s grown so fond of when you’re not around.

$89 to $119

SIX MONTHS

Michelle Chang Fox Necklace
Gents, no matter what your younger sister says, steer clear of the Tiffany heart at the half-year mark. Popular though it may be among the 17-year-old set, it has no place in the fun, thoughtful, “adult” relationship you’re finally committed to. Instead, let her know she still gets you hot—and that you can still make her laugh—with Michelle Chang’s Fox necklace.

$98 for sterling silver, $298 for 14K gold
 

Plum Pretty Sugar Robe
The next step on the chain of commitment? Showing her you’re serious about regular sleepovers. Sexy as she might look lolling about in your old concert tees, the girl will seriously appreciate a permanent piece of her own at your apartment. Start simple with this sweet robe—casual enough for her to feel comfy in but short enough to still flash some leg.

$65