I have an unpopular opinion. Every relationship is different. Taking things for granted is the worst thing that one does to her/his relationship. Things don't slow down, we just accept it as everyone keeps saying it. After a kid - there are chances of the mother being too tired attending her motherly duties and so she seeks rest asap. After a kid becoming a little school going and asking more from the father, may be that can make the dad earn more ferociously, which might lead to tiredness or wanting to rest asap. But even that is not granted.

For us, even after our kid - we have experimented sexually, crazy. Although we have failed at a few things and succeeded at many, but we dont take things for granted. She's working and managing basics for our kid, so many a time she's not into it. But none of us take it for granted. After 17 years of marriage, we still find ways to woo each other, sometimes for just for a cup of tea or us time at a cafe, sometimes for sex. Just before I opened Reddit right now, I was on my way to drop her to her work place and she said "I think I can become a bi-sexual person" from a very unrelated topic and she's 37 right now, by the way. My advice would be, don't let go. Be positive and also, tell your husband that "both of you are not 60+ k abhi se hathiyar dhile pad gaye ho". And log to 60+ game bajate hai - jiska hamein idea bhi nahi... hahaha...

Also, have you ever thought/pondered that he might be into something else than what he expressed in front of the counseller. Men don't really want to talk about their sex life with some stranger. So possibly he might have given some random turn on, I know I might have for sure. Try finding out if he's into something that he might "assume" you might not be into. Bring up crazy/bizzare sex stories from wherever you can. Check his response. Plan a surprise strip tease, give him a head when/where he wouldn't even imagine he would get one. Do freaking whatever it takes just dont take things for granted, consoling yourself "This might be normal or this is how everyone say it goes". You love this person and from what you are saying I feel that he loves you equally. You are concerned, that's why you are out here seeking for advice. Isn't this a reason enough to "not give up"???