If it was, I'm sure it was unconscious. Tom's loyalty was based on total dependency on the Corleones. Sonny had rescued him from the streets--even possible starvation. Vito virtually adopted him, put him through college, made him rich and important. But it all hinged on being inside the Corleone family, where he'd spent his entire life--and with which he was totally identified (as in the FBI chart). I don't think he could have functioned on the outside.