There are several people in my clinical psych Ph.D. who've had children while in the program or on internship. It can be stressful to juggle it all but it sounds like a proper vacation compared to what whopper described. I think Ph.D. programs are more varied as far as culture goes compared to the medical education track. Definitely feel out the programs and ask to talk to grad students who have families.
If you want to do behavioral work and you don't care about salary then in my opinion medical school should be thrown out the window. Your interests actually seem more lined up with Speech/Language Pathology--and you could be practicing after a 2 year masters (3 if you have no undergrad coursework in this area). I believe in all 3 fields you do end up having to choose between adult/children.
Btw, I don't recall Sidney Friedman prescribing any meds. Did he? :
edit: Tho its not really a fair question I guess cause it was set in the late 50s