From here. Good problem solving skills that boy had.
She bent an arm behind her own back to twist and undo the bra's closures, while she stretched her other arm over her head and pulled her shirt off with that hand. If there was one thing she'd picked up with the X-Men, it was multitasking. Logan would- well, possibly he would have been impressed. 'Proud' was probably a stretch.
Okay, so she wasn't going to think about Logan.
Barely managing to drop the shirt off to one side and not bothering to pull her bra away, she dropped her arms again, hands landing at his shoulders and sliding up, to his neck, then down his chest, the sides of his ribcage. Her fingers curled into the fabric of his shirt and she pulled up with one hand while her other skirted along the line of his hip to his fly.
That takes talent. Spike is impressed. Actually, he's too busy being turned on, and beyond on, to deal in such emotions as 'impressed', but at some stage he may reflect upon this and be impressed.
He pulls her bra away, to be helpful, and takes his mouth away from hers to press lips and tongue down the side of her neck, which is maybe less helpful to her general coordination, but he doesn't think she'll mind.