Attending Sister-in-laws baby shower

Melissa
I feel like such an ass- but I really do not want to go to my sister in laws baby shower. My mom is hosting the event at her house but I'm so uncomfortable going. My husband and I have been trying to conceive and lost a pregnancy last year. It's really hard for me to get excited or want to be around them... I feel horrible and know I need to go... Anyone have any ideas on what to do?