Husband wants DNA test on planned pregnancy

So I'm gonna post this anonymously because it's so embarrassing but I'm really lost for words right now..My husband and I planned this pregnancy. From removing birth control to the Pre-Seed to ovulation strips to the dozens of pregnancy tests... Let me first start by saying my husband is an amazing man. He takes care of me and has with pride stepped into the step father roll to my first born son from a previous marriage. I couldn't ask for a better partner but this... this has really got my emotions rolling. Once we established I was in fact pregnant my husband stated very openly that he wanted a DNA test to be done. His perspective was that it was completely normal protocol so that he always knows and never has any doubts. Mind you I've never cheated on him or given him any type of reason to not trust me and he claims to trust me 10000% when this was brought to my attention I was pretty shell shocked to say the least and very lost for words because one half of me felt like someone had just spit in my face and called me a whore and the other half of me felt like I had to choose my words wisely because If I say "NO! How dare you even ask such a thing of me!" Would infact make me look guilty and there would be even more intense strain and more trust issues that I'd have to endure until it was laid to rest all the while potentially damaging our relationship even more.... I cried, and told him how it made me feel. That it made me feel dirty and like he had zero trust for me. It made me question how he viewed me as a woman and what value I had in his eyes if he felt the need to even do such a thing. It just in all made me feel like trash but I told him we were getting it since it's a topic of conversation because if that's how he feels then I never ever ever want him questioning me again. I will never ever be accused of something and have him bare any reason to state this baby isn't his and that he owes me an apology when this is all said and done. He told me then that his reasoning for it had nothing to do with questioning my loyalty as a woman, that it was more so because his father and mother raised him to always be safe instead of sorry and find out for sure, it was apparently a practiced thing in their household anytime his mother got pregnant his father would do a DNA test on each child. He stated that to him it was just a custom thing he felt was normal and that his mom never had and issue with it. I did hold onto that reasoning and I did through time allow that reason of his to help me cope with his decision and move on though it's still been a bothersome feeling in the pit of my heart. His reason helped me be more at peace with it and move forward...until today. I'm 33 weeks and 2 days since first being asked, I even made the effort to find a place that issues paternity tests I did this because I made it clear that I would not go through the stress of laboring In a hospital and then feel uncomfortable stuck surrounded by nurses who were asked to administer a DNA test. I'm just too embarrassed to deal with something like this and have them judge me for 3 days straight about why we are doing it in the first place. Anyway, I asked that he respect that and not mention it in the hospital but once released we can drive straight to the testing center and have it done. He agreed.. here is my point of this post. Tonight we went to his parents house to visit, pretty standard for our Sundays. Somehow we got on the topic of the DNA testing being done between people who aren't committed to each other. I threw my opinion in and stated that "I was pretty offended by the idea of my husband asking me for a DNA test until he explained to me that it's just normal for you guys." Both of his parents stopped mid sentence and immediately said "What do you mean??" I was caught off guard thinking maybe I offended them by saying that so I corrected my statement and said "I mean like "husband" said you guys had DNA testing done on all the kids, because you know..a woman knows for a fact and the man doesn't." They just stared at me and my husband immediately speaks up and said "What? I never told you that they did that." My neck just about broke and they immediately started denying ever having any kind of testing done other than ancestry. I looked at my husband and said "Yes you did tell me that." His father looked at him and said "you're doing that?" He said "I mean Yea it's gonna happen regardless." His Mother stated that her husband never ever asked her for such a thing that she would have walked out if he did. My husband was just like "well we are doing it so I know 100% for a fact." I'm sitting here so damn embarrassed and confused that this was even a shock for them and that they felt the same way I did. I quickly changed the subject because my husband was denying ever saying that to me so part of me felt really embarrassed and like I looked like a liar and like their son doesn't trust me. We moved on with our night but best believe when we got into the car to head home I was asking him why he denied it. He claimed that he forgot he told me that and that he really did think it was a thing in their household. That he just remembered after a few minutes of us talking about it. Here's my issue with tonight. If he remembered he said that to me why the hell didn't he state that he must have had a misunderstanding growing up because he did say that to me as his reason and he forgot. Instead he played it off in the conversation with them as if it was never a reason but that regardless he was gonna have it done because he wanted to know for sure. I feel like I was lied to and now past issues are sinking back in for me, I'm stuck because obviously I'm not backing out of the test but I feel like there is just mistrust and unreasonable insecurities there that he's not willing to admit to. We get home and it turns into war and because I have more questions for him he gets mad at me because I won't just believe that he's telling me the truth and that he really did forget saying that to me. So now I'm stuck wondering, which part did he lie to me about, the first initial reasoning months ago?Tonight? ALL OF IT? I never ever want to believe he would be dishonest with me about his feelings or that he would have any reason to lie but there are some red flags here that I feel like I can't ignore. Again none of this changes the fact that I'm doing the paternity test it just makes the reasoning for doing it not settle with me right. I want to be at peace with this.