She has been really firm and has just told him this is how it will be for HER.
She likes his children, but has only seen them occasionally for years.
Now that they have moved 10 minutes away they have suddenly discovered her lovely home and garden, she is also a great cook.
She was pleased for them and celebrated the new babies with a lovely generous gift, but she isn't granny and has zero interest in sitting around hosting them both days at the weekend.
Things came to a head when they just turned up the third Saturday.
She grabbed her bag and was gone for the day and left her husband to it.
That night she told him enough, he needs to visit them at their houses as it was too much.
Her house remains hers since they married, just as his house will go to his children, it is currently getting excellent rent.
She is busy renovating the cottage and looking forward to using it.
She told me last week that her step son mentioned to her husband it would be great to use it for weekends when its finished.
She knocked that very firmly on the head.
It's like after 15 years of absolutely no interest whatsoever in her, knowing her, they have decided perhaps she might be of use to them after all.
But she has zero interest in the relationship changing, and for her to be of sudden use to host and babysit, and play Granny, when she really isn't.
She is a really nice person but she has no wish to be more involved.
She is far closer to my kids than them.
My kids love her.
She has spelt it out to her husband that he is welcome to visit them as often as he likes, but she is not interested in her house suddenly being used as the family home after 15 years.
I think because she has always been so quiet and kind, on the couple of occasions they would see her over the years, they just assumed it would be ok.
Pre them having children her husband would go out for dinner regularly, always paying, without her. They preferred it that way and she absolutely respected it.
She kept completely in the background on their wedding days and completely understood her husband and his Ex being at the top table.
But now suddenly they have moved close enough to think her home can become a weekend hangout.
Not happening.
Her husband understands because she has been so firm.
That is why she told him to hang on to his house as you never know if it will be needed.
Their mother is also remarried nearby but her house isn't very big and she plays a lot of golf with her husband so isn't around much.
She wants to be kind but she has zero interest in being recruited suddenly for a role in their lives after 15 years of being very much on the periphery.
She has earned her retirement.
It has been made very clear that her home is by invitation only, no more dropping in and staying hours on end and expecting to be fed.
I don't think she is unreasonable at all.