Put them on

Bending over you slip first one leg, then the other into panties, gently tugging them up your legs and into position. A soft, feminine sigh escapes your lips as the tight, lace material surrounds your intimates. Rubbing your butt through the soft materials and then your front sending shivers down your spine as you quickly grab the bra as well.

Clipping it at the front as you've seen women do your whole life, then spinning it around and slipping your arms through the straps. The cups were obviously empty since you lacked Nikki's ample C-cup but you could still feel the tightness around your chest and the lace tickle your sensitive nipples.

Walking to the mirror you see your usual male self but wearing the sexy underwear, blushing as you see how silly you look. Though still feeling sexy as your strike a few poses and blow a kiss at the mirror before letting your hands explore again, rubbing the lace over your cock as you feel the slightly crusty stains Nikki has left on them.

Your dick twitches slightly as you open your eyes and get pulled out of the fantasy, it wouldn't do to make a mess in them otherwise she'd surely find out. Figuring you've got a few weeks to explore your sissy side you slip out of the underwear and put them back as best as you can, before stepping into the shower.