[m]umma[m]ia said exactly what i was thinking!

I'd find out if MIL had problems BF and so in turn doesn't want to be out shone by her DIL????

I was 'forced' to stop bf when my son was around 2yrs old and it is still something i regret!!!!
But you do what you feel is best as a mother and tell Dh to get on board and support you because the minute you do start using bottles he'll be doing the night and early morning feeds and winding and nappy changes so... if he's not keen on that idea then tell him to keep his mouth shut and thankful that you are doing such a great job!!!!
You can tell him you love him but with him not supporting you in this, makes you feel unloved and that's just unfair!!!