Telling my step son! 🤗

Cheyenne • Married 10/2/15 to the love of my life 💍, Lost baby #1 on 3/2/17 at 6 weeks, now expecting our rainbow baby 🌈👶🏻 6/8/18
After my first appointment around week 8 on 3/21 my husband and I are wanting to tell his 9 year old son that he is getting a little sibling! This is my first child I really want to tell him in a cute and memorable way, I already know he will be so excited since we have been laying some ground work for a couple years now about possibly being a big brother one day. My step son is like my own child already and we have a great bond, it is so important to me that he feels 100% included in this pregnancy and about being a big brother. Have any ideas on a cute way to let him know? Anyone else have step children that they have got to tell the good news to?