Part 2 video tutorial

8th round – ch3, dc1 into sm.ch, dc1, dc2 into 1ch, sk2, [dc2 into 1ch, dc2, Vst1 into Vst, dc2, dc2 into 1ch, sk2] to last 4chs; dc2 into 1ch, dc2, dc1 between dc of prev.round and chs + hdc1 into 3rd ch
Use a larger size crochet hook to widen the garment.

9th round – ch3, dc1 into sm.ch, dc3, sk2, [dc4, Vst1 into Vst, dc4, sk2] to last 5chs; dc4, dc1 between dc of prev.round and chs + hdc1 into 3rd ch

10, 11, 12 rounds = 9th round

13th round – ch3, dc1 into sm.ch, dc2, dc2 into 1ch, sk2, [dc2 into 1ch, dc3, Vst1 into Vst, dc3, dc2 into 1ch, sk2] to last 5chs; dc2 into 1ch, dc3, dc1 between dc of prev.round and chs + hdc1 into 3rd chJoin front and back parts together
Join front and back parts together

14th round - ch3, dc1 into sm.ch, dc4, sk2, (dc5, Vst1 into Vst, dc5, sk2) x 5, dc5, Vst1 into Vst, ch10, skip 4 repeats, Vst1 into Vst, dc5, sk2, (dc5, Vst1 into Vst, dc5, sk2) x 5, dc5, Vst1 into Vst, ch10, skip 4 repeats, dc1 between dc of prev.round and chs + hdc1 into 3rd ch

15th round - ch3, dc1 into sm.ch, dc4, sk2, [dc5, Vst1 into Vst, dc5, sk2] to last 5chs; dc5, dc1 between dc of prev.round and chs + hdc1 into 3rd ch

16, 17 rounds = 15th round

Work other rounds like your 15th round using a smaller size crochet hook to about your waistline. After that, use the larger size crochet hook again for about 10 rounds. Then work just one increase round.

Increase round - ch3, dc1 into sm.ch, dc3, dc2 into 1ch, sk2, [dc2 into 1ch, dc4, Vst1 into Vst, dc4, dc2 into 1ch, sk2] to last 5chs; dc2 into 1ch, dc4, dc1 between dc of prev.round and chs + hdc1 into 3rd ch

After the last increase round, crochet rounds using the largest size crochet hook until you reach the desired length of the dress.

Sleeves
Attach the yarn underarms, sl.st.4, dc5, sk2, [dc5, Vst1 into Vst, dc5, sk2] to last 5chs; dc5, sl.sts to end

Neckline
Work sl.sts to end