Stepdad Wants mums ashes with ex girlfriends ashes

[Wishiwasstill25]

Hey, wonder if anyone had any advice on the following:
My step dad has made me executor of his will. (He is in his 80s but perfectly healthy right now.) In his will he has stipulated he wants my mums ashes (his ex wife) placed in a plot with both him and his ex partner! The ex partner and he were only together for 4 years, never married and met several years after my mum died. He was married to mum for 30+ years. This new woman was very short term in comparison but he lost he just last year.
Do I have to follow this out? My sister has no clue (we are estranged) but would go mad that our darling mums ashes would be buried with a woman who she never met!!
Any help would be very much appreciated.
Do I get a say over my mums ashes or do I have to bury them based on his request?

Ah totally understand that @Hoppinggreen .To be honest our Dad loved the holiday place probably a bit more than Mam. We just thought they should be together. Plus we had gone on holiday there as children with them. So happy memories of us all together.

That sounds lovely.
My Mum couldn't travel for the last 5 or so years and before that the only places she really loved were abroad and I am not sure how taking ashes on a plane works.
We will figure it out one day I am sure but for now she is fine where she is, I sometimes chat to her while pottering around the lounge

What did your mum say she wanted done with her ashes? That would override what your Dad might want done with them.