WARNING! This article contains SPOILERS for How I Met Your Father season 2, episode 2, "Midwife Crisis."Ted and Marshall’s dynamic in How I Met Your Mother explains why Sid chooses to keep Meredith’s secret from Jesse in How I Met Your Father season 2. In addition to living in their old apartment, Jesse and Sid’s friendship and their perspectives on love have established them as How I Met Your Father’s new Ted and Marshall. By sharing so many similarities to the spinoff’s characters, Ted and Marshall’s actions in HIMYM give insight into the reasons behind Jesse and Sid’s tough choices regarding each other in How I Met Your Father, and may even help predict what happens next in their storylines.

https://screenrant.com/how-met-father-himym-sid-meredith-secret-keep-prove/