Worried about my husband (he gets depressed / suicidal)...

Chrystal • With my SO for 9 years & 8 months /married 5 years & 8 months. It is July 2016 & we have been TTC our 1st child since Jan 2015. <3
Long story short, my husband has some mental problems. In the past when he has become suicidal, he has decided he was going to leave me (because in his delusional state he believes that’s an easier pill to swallow than finding him dead, I guess). It has happened twice and both times after I found out he was “leaving” (AKA going to attempt suicide) I found out that he had told his dad that we were breaking up mutually or that he was leaving me. He went to visit his dad out of town today and I barely heard from him while he was there (not upset about not hearing from him, per se. I have zero issue with him spending time w/ his dad). I’m just a little worried, because he has seasonal depression and it’s that time of year when it usually gets worse. I’m fighting myself not to call his dad and make sure he didn’t tell him we were separating, because he has been depressed and he could possibly have not text me most of the day, because he didn’t want his dad to think it was weird that he was texting me since we’re “separating”… It’s not completely logical, I know but I get scared and worked up thinking about the idea of him committing suicide. My problem is that I feel like it’s morally wrong for me to call his dad and put him in that spot. It isn’t a matter of thinking he is planning to leave in the sense of being insecure in my relationship. He’s an amazing man and husband and treats me like the most important person in the world to him. I’m just scared for his own safety (and my own emotional health in the event he were to commit suicide). Anyways, Just wondering what anyone else thinks about the situation & if it’s immoral to call his dad and talk to him. =(