My partner was like this, so being in a different room helped but years later ( toddler age ), he doesn’t care, will try initiate sex or hint while the kids in the room but I’m the one not ok with it 😂 I can’t relax unless I know the kids are asleep so we made sure they had a strict bedtime routine so that we have a few hours to relax, catch-up or enjoy a movie together or have a quickie if we’re exhausted 😂
Why don’t you ask a family member to look after the baby for a few hours so you both can relax and ease into it? X
Can you go to the living room? At 3 months, the baby can't even see the, but if he's uncomfortable, go to a different area.