Shameful - on the part of your father!
I am familiar with cases in which the father (post-divorce) married another woman with children of about the same age as his own children (from the first marriage), and began assuming the role of "father" to these new kids (taking them to Cub Scout meetings, etc.) - while his "previous" children languished.
Shameful!
Regards,
My father had “issues”.. after his death I learned 1) his father committed suicide by hanging himself somewhere on family property when he was 14...2) a year later his grandfather was murdered by the hired hand...so..he joined Navy and was in Battle of Leyte at age 17...made a lot of stuff fall into place. My mother was her own special piece of work...