Husband Watching Transvestite Porn

I recently found my husband’s been watching porn with transvestites (only trans). I brought it up to him and at first he denied it and then told me it’s because he got bored of the regular porn and he masterbates to it to last longer in bed with me.

Part of me believes he could be gay, bi-sexual or trans. The other part of me thinks he could be an addict or just into some different stuff than me.

We’ve been together 10 years and up until this point I thought we were very open. We have 2 young babies at home.

Has anyone had to deal with anything like this before? What could it be? Could he be confused? Addicted? Kinky?