Follow the instructions above and try to quickly reach the 2nd scream, and then wheel-up until you reach the 3rd scream (orgasm). When you reach it, go back a wheel-tick and wait there on the 2nd scream till the mushroom turns red-with-bumps and then scroll up to the 3rd scream and you'll cum together. Also, if it is the first time you're penetrating her in that H-play she'll ask you if you want to cum at the same time with her or not. If you answer "Yes" (left click) you're going to get a "pass", being able to continue penetration even if the mushroom is red-with-bumps until she cums.