Easy level
Task for the woman
Find somewhere and some way to secure a sex toy (if there really is no other option, your guy can hold it for you). Then get on your knees and show him how you give him a blowjob, so he can watch it from the outside. Try not to be shy; even better, do it without using your hands at all.
Similar tasks
Medium level
Task for the woman
Your task is to give the messiest, dirtiest blowjob possible. Saliva. Lots of saliva is your best friend. Let it run down his cock and your face onto your breasts and body. Feel like a dirty little slut.
Medium level
Task for the woman
Put on a naughty show with your toy. Use it to let your guy watch what it looks like when something slides into your mouth. Try to make it as naughty as possible, but cute too :)
Medium level
Task for the woman
Give a dildo a blowjob while looking at your partner. Then take his cock and suck both.