Help me step mamas!

Ok so lately ive noticed whenever my step kids are here I can’t stand the thought of having sex with my husband. Which sucks because he’s a police officer and has them every time he has a day off. Every. Day. Off. He works nights so we don’t get any other time alone. I think it’s mostly because when theyre here alllllllll they talk about is their mother (and she’s a nasty evil woman). I get that she’s their mom and they’re going to mention her but when I say it’s all day, it’s ALL DAY LONG. And she’s texting him. And calling them. Not only does it totally ruin our family dynamic (we can’t ever do anything as a family unit, which creates problems of its own) but at the end of the day after hearing about her all day I just cannot stand to even have him touch me 😔. He knows most of this. Not the last part. I know he would get so mad and defensive. It really would not help to tell him that. She’s been asked soooooo many times to let him/us have our time with them and to not call them all day and he’s told her she really doesn’t need to be texting him all day but she doesn’t care. And she’s also crazy. But how can I separate the two aspects of our lives?