Husband lying about TTC #2

He keeps saying let’s try for baby #2 (son is 2.5) but I know he is not coming in me because when we have sex and he is “coming” I think he pretends. The reason is because he wants me to jerk him off right after or give head which I find sketch. I ask if he really did come inside since we are “trying” and he swears he does but I don’t understand why he has to come again. It does not make any sense. He says because he’s still so horny and his thing pulsates after orgasming in me. I’ve brought up my concerns about 100000 times to him and he swears he wants another baby. I told him do not feel pressured into having another baby and just be honest because I don’t mind getting on BC and waiting longer or just have our only child. I told him we need to talk seriously about these things and try to agree on something. He keeps saying he wants 3 kids total but I’m not seeing that since he keeps trying to jerk off right after sex. One time I touched his sperm after jerking off and inserted it inside and he was flabbergasted and got me plan B. He said the reason is because he doesn’t want to remember us conceiving in that way. He wants it to be special like it was for our first. I wore lingerie and it was a full moon and he feels happy that it was a good memory conceiving #1 that way. To me it doesn’t matter I don’t care or think of these things but I guess it matters to him but idk what else to do with him. I’m concerned he’s lying about baby #2. He did something similar with baby #1 because we were TTC for 7 months with no luck because he was jerking off purposely 4 times a day to not get me pregnant when we do it. I found out after I pregnant when I was telling people it was taking so long and he told me secretly we don’t have fertility issues and that he was purposely not trying to get me pregnant for some time. That’s why I don’t trust him in this matter. Other than this our relationship is good and healthy and I have no complaints at all so before I see comments saying leave him etc etc. TTC is the only issue with us and tbh idk what to do right now or get the truth out of him. Should I go on BC and tell him to test his reaction? Any other suggestions??