Tickling challenge with my girlfriend

Description: My girlfriend confessed to me that she's really turned on by getting tickling. so she asked me if i could tickle her. of course, i want to make her happy, but with one condition. she can laugh, but she cannot move. will she be able to do it? or will she fail? we will see. i'm going to tickle her armpits and belly, and then i'm going to tickle her neck. and last, i'm going to tickle her feet, first with socks and then without them, to see in which way it gives her more tickles. will she be able to complete the challenge?