My dad forced me to kiss him from toddlerhood until adulthood, ignored my no, and would "steal" kisses, pecking my cheek as he walked past etc. I truly hated it and it made me not want to be around him because I felt like I had to avoid him kissing me. I got wrong for pushing him off me, so I didn't do it again and felt disgusting for allowing someone to kiss me who I didn't want kissing me, and felt it unfair that he didn't demand kisses from my brother.
Dd didn't like anyone kissing her, I was making sure her no meant no, My dad (and a few other men in family) tried to guilt her, "if you loved me you'd kiss me" beg her to change her mind "just a little one, pleaseeeee" or feel entitled to physical affection from her cos they've given her a gift. She would say no repeatedly, he'd Tell her she's a meany, not to be silly and I had to step in when he went to physically grab her to kiss her. She's 10 now, dad died when she was 6 and her memories of her grandad are of him trying to force her to let him kiss her.
If I let him do this, then what happens if a boy does it when she's older and she thinks it's ok because her grandad does it? If the men in her life don't respect her boundaries, she won't expect others too.
It's not a message I wanted to send to her, that people can kiss you regardless of how you feel and we've talked about how if anyone makes her do things with her body that she doesn't want to, then she's to tell dh and I, or an adult she can trust.
Her dad should respect her boundaries, he should be one of the people in her life she can trust, she doesn't want to be kissed, he shouldn't kiss her. It may a quick harmless peck to him but if your dd feels differently and doesn't want it, he puts his wants aside and respects her wishes. I couldn't punish my dd if she reacted to unwanted physical affection with a slap, her words didn't stop him doing it so she tried a different approach. (I'd want to slap someone kissing me when they knew I didn't want it too tbh) I'd be telling my dh he needs to apologise to dd and promise her to not do it again.
Hope you manage to sort it and have a lovely Christmas 