Question:
Does one sit shiva on Chol ha-Moed Pesach?
Answer:
No. Yom Tov, including the days of Chol ha-Moed, interrupt a shiva, and one does not sit shiva on Chol ha-Moed.
If the burial is before the festival, the festival interrupts and effectively stops the shiva; if the burial is on Chol ha-Moed, the shiva begins after the festival.
Best wishes.