My husband is bi

I think my husband is hiding the fact that he is bisexual from me !

There has been lots of things pointing to this but he always gets super pissed when I ask him if he is ....

it's like he is hiding a part of himself ...

I don't know what to think of he is ... because I couldn't picture or be okay with him sleeping with another man ... but I have seen gay porn on his web history before we got married .. I caught him taking pictures with my buttplug in a few months ago that he never sent to me ... but he says he wanted to but was to afraid but if he didn't send them to me who were they for ?

I saw this message from before we were dating and I know this means he really is but idk how to move forward from this ? How to I maintain a healthy happy relationship when he won't admit to me that he is either bisexual or maybe even gay ... our sex life is really good but I feel like he wants things I can't give him.. how do I handle this ?

Should we not be together ?

Should we try to stay together ?

Will he end up turning fully gay and leaving me and our kids ?

Btw this isn't his number now so that why I didn't cross it out !

And I'm also 30 weeks pregnant with our second child and I'm so worried that we shouldn't have gotten married or had kids if he wants to sleep with men ! Maybe I'm overthinking but idk ....

I let it go before but after seeing these messages and him taking pictures with my but plug in I feel so betrayed and hurt and kind of disgusted