She wasn't exactly caught off guard, but it was a pleasant surprise. Elisabeth let herself forget the rage and recent betrayal (in her eyes), and melted in Remy's arms, succumbing to the kiss. She loved when he added the kinetic charge, her initial reaction jumping a bit. But the longer he kept it going, the less able she was to withhold any moans, her voice muffled against his mouth. It was a rarity, this charged treat, and she did well to reward him later for sharing it with her.
Thinking them much too exposed in the garden, Elisabeth shadow ported them home, where clothes could be discarded without worry of breaking any laws and her heart could mend itself in ways only Psylocke ever thought helpful.