DP lying for DSD’s mum

[idontbelievethat]

DSD is 9 and lives here with dad. Mum has her a couple of hours to do something fun here and there, for the odd weekend or holiday ect. Very much ‘Disney mum’ as it’s called on here.

Understandably DP does his best to facilitate as much of a relationship as possible even when it inconveniences him and avoids ever talking negatively about her mum.

As she’s gotten older this means he ends up lying and pretending to be the bad guy to protect her mum and DSD’s feelings.

Will say mum is busy/ working when she isn’t or apologise and say he missed a message, forgot or said no to explain when why she hasn’t seen her etc.

Obviously mothers day tomorrow, dp has messaged mum over the last couple of weeks to arrange time DSD could go to see here this weekend but she’s busy(doesn’t want to.)
DSD has asked today if dp has heard from her mum and what time she can take her card+present.
Dp said something about how we’ve got family plans and we’re going to celebrate my Mother’s Day tomorrow and that I want to spend the day with her.

I feel this makes me seem like the bad guy who wants all her attention and isn’t allowing her to see her mum.

AIBU to not want to be the bad guy and think he’s not really protecting her by lying?

I don't lie to my children about their father but not do I lie to them. When he's too busy to see them I tell them what he's said, 'daddy is busy, I don't know what doing, let's do something nice together', 'i don't know why daddy has gone off for a month, but it's not because of you - let's go and do something fun'.....rinse and repeat.

I will not allow myself to be a martyr and the bad guy for his bad choices and neither should you, stand your ground and tell you DSD that you would never stop her from seeing her mum but she said she's busy so we are going to do something lovely.

I told him I wasn’t happy and he has apologised. It wasn’t his intention to blame me just as it’s Mother’s Day and we have plans he was trying to distract her with that and was suggesting it was his his idea she stayed for it not mine.

It’s a bit late now to back track on this one but agree it needs to change going forward.

He needs to keep it simple and just say 'sorry sweetie mum says she is busy' and just keep repeating.