Future BIL babysitting tonight - why am I worried?

[hidingunderadifferentname]

Changed name due to sensitivity of subject.

SIL (dh's sister) has been dating future BIL (no relation to us, just SIL's "intended") for just over 12 months and they are newly engaged.

Have seen BIL a fair bit and quite like him. He is amiable, helpful etc. He's a man in his late 30's.

SIL is working tonight (nurse) so can't babysit (she usually babysits and brings him with her)- so he wil be babysitting for us.

The children now and like him, but they will be in bed when he arrives.

Am I being ridiculous to feel uncomfortable. I daresay I will be berated for saying the following....deep breath...but - you hear of men cultivating and winning over the trust of women / young families and ingratiating themselves into family life to....well you know where I am going with this thought process.

Would you be happy with this babysitting arrangement?

Children are 2 and 4

I was wondering that too, Aviatrix.

i would feel uncomfortable too.
i only let very close family members babysit.
i don't even let DP babysit for me. which i'm ashamed of, i would never admit that to him. but my loyalty is to my children and as mothers our main job is to protect our children so regardless of whether our fears are founded or not you do what feels best for you and your children.

I did go in the end. Reasoned with myself that I had no reason to doubt future BIL. Told myself I was being irrational.

However for peace of mind will come up with alternative babysitting arrangements in future.

Thanks all