My initial instinct is very much that theirs was a marriage of convenience and that with the exception of the period immediately prior to the marriage (which coincides with the public displays of affection), Lewellyn lived a life of sexual frustration. We also see that stepchildren and adoption were a constant in every generation for him. I'm intensely interested in his childhood but I won't sleuth family members.
@diggndeeperstill, in response to your question about yearbooks classmates.com has a shocking amount of high school yearbooks scanned and archived
Find Tuckerman High School Yearbooks - Classmates
It can be somewhat cumbersome to navigate them as the site tries very hard to funnel anonymous browsers to signup and then unpaid members to paid memberships but it all can be accessed publicly