Advise on spicing up our love life

So I'm 26 and my partner is 36 he is a essential working during covid 19 I am a stay at home mum to our blended family of 6 his 3 from another relationship my 2 from another relationship and our 1 baby together.. I wanna show him just how much he means and all he does for me and the kids.. what would you ladies do to show him just how much he means in the bedroom keeping in mind I am currently 21 weeks pregnant I'm Abit of a shy person in bed but wanna try something new just for him any tips