Valentine's day vote

situation: you find yourself tied to a bed unable to move at the foot of the bed is megumin, aqua and darkness (konsuba) you must pick one to be your valentine..... the one you pick will ride you till you "pop" (sorry patreon wont let me say the normal words...) the other to will tickle you out of jealousy to try to ruin it 

so whos your valentine?